Ariankentara Answer is simple. You did not spend SS to unlock it previously. It was unlocked for free back then and they have just been retroactively locked.
Chapters locked again
CKtalon I understand about the ones that started out free, but this has even happened with novels that I have purchased the chapters on. And before you ask yes I did go back and check my spirit stone history, I now have quite a few entries there showing that I have purchased the same chapters multiple times. This isn't the first time I have had this happen either. It's rather frustrating especially when half of the time the links to purchase spirit stones don't work. They don't work on either version of the app I have, internet explorer, or Google chrome for me. Ugh 
Ariankentara Post some screenshots and your User ID number. You can host your pictures at http://imgur.com
I'll get a dev to look into it.
CKtalon this shouldnt be happening this just feels like we are renting novels. btw history resets every 60 days so what do i do with he chapters that i unlocked before... ill never get the moneys worth i used on those...
This happened to me as well with advent of the archmage chapter 229-266.
I haven't checked the other books I'm my library yet.
MysteryOriginal It's a permanent purchase. I've not had any of the chapters I purchased revert back to lock. Most of the time, those chapters were never "paid for with SS," but were released for free.
CKtalon if that was the case i wouldnt be complainibg here...
MysteryOriginal Do you have the logs to show that you purchased those?
CKtalon yo, what happened after my chat to you and I even chatted to dev he was going to get as well that was 2 weeks ago,
i showed my posted screen pic's and I give my id etc,
you were going to get back to be over a month ago ???
should I be reporting this to PayPal and asking for my cash back ( as I trust no internet company ),
as on top of my missing unlocks which you saw and we chat in this forums about,
today I basically work out that the novel I was buying gifts for seems to be dumped bt the tl team with no warning after gifting today as well I can remember all the QI CSR's comments on novelupdates say qi is the best etc ...oddly i still have those screen pics from the post before it was added to the mega post on novelupdates
You should try to encourage us... We unlock chapters instead you lock them... It's so discouraging....
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Pizz IIRC, the 1SS chapters were a problem with the backend, which made those TNC chapters 1 SS. Since it was Webnovel's fault, they are honoring their price mistake. Which I assume you still have them unlocked.
As for the others, it seems like you just didn't purchase those chapters.
FYI, no one is going on NU to do CSR stuff. NU figures very little in the big scheme of things already. Only a few translators will go there to stir up drama for the lulz, but it's done openly with their nicks.
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CKtalon the 1ss bit wasn't a huge problem, but with not only my comments but a lot of others, there is no way you can totally say it is you missed a chapter total..
I do agree 1/2 max but not a with the gaps i showed and timing..
The CRS bit was from before QI had the site even running it was all from novelupdates...
rem all the promises in the mega post that goes back over 3/4yrs-ish
you should do you even have comments in it ...
Those CRS comments come from then ...
if you don't rem that far back ..a lot of users do and even have saved forum posts ..
for a reminder QI, in fact, had 3+ CSR's in total due to comments and posts they posted wrongly ( and they we're replaced) .....
if you still have a problem with that ..their still in that same mega post and achieved on novelupdates ,
you forget some of us readers have been reading and part of the community for a very long time
( given my age, I'd even call myself old )
unlike some of the newer ones that have no clue like qi having to go thru 3 facebook pages due to the comments created by the CRS's on novelupdates ps I'm an FB group admin for a novel group and we even still have posts also part of facebooks (own) admins group
rem all the problems with WW and the GT buy out, the replies on reddit from GGp ..
I do
as I was questioning stuff and even had my comments screenshot and re-posted on that mega post by someone else at the time if you still unsure about that CSR stuff i can post it happily, I hate being brushed off I just like problems fixed, i need to do for my IT company when mistakes happen
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Pizz That was nearly two years ago. Besides, the megathread is filled with wrong information from both parties, not to mention that it's highly biased against Webnovel. Any logical errors raised or 'evidence' shown are just ignored as shilling, so the staff doesn't bother with them anymore.
I'l try to get the exact log of the chapters you purchased from the devs (beyond the six months). Which book are we talking about?
CKtalon cheers, and yeah an also agree a lot of wrong things were said from a lot of side's,
I was even a backer of your ad unlocks when other were not, were I didn't agree with other stuff like forgive me saying this one CSR going on and on about Tencent creating the website and app designs with the end idea of the site being a totally multimedia site ..
I myself think that's a pity, as you did slowly go that way with the TKA anime and I'm looking forwards to i believe the end of this month or the start of Feb 19th for the season 2
my FB group is rabid for it and ofc i will be post that on release as we do for a lot of stuff, but it would be great to get the anime back and the comics are cool but I think the wrong price balance is a little off
going back to your novel request its 3 novels and i will get them on her later on and I'll even redo the screen pics, as I said I can as you said say maybe I missed 1-2 possibly but not all that's all that been my point as I log in every day since day one on this account also comment to get the max 70 xp as i'm sure you note by looking at my id .. i hope to add the screen pics in next few hours as on phone at the sec
The same happened to me with Alchemy Emperor of the Divine Dao a couple of months ago, its quite frustrating.
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Quidian relocks chapters.
When i first had some chapters relocked i tried contacting quidian. I was told post screenshots. The relocks were from older than 6 months so screenshots were impossible. I post what I can research and what happens? Nothing dead thread.
Respondees will humor you for a bit but Quidian themselves do nothing. So i am left with chapters relocked after spending SS on them and 0 answer as to why Quidian does not mention it in their SS explanations.
Only thing i can come up with is they are trying to be the steriotypical chinese that we read about in all their translated books. Carring about face while never fully holding up to what they proclaim.
Edit
If i sound unhappy about it, it is because i AM unhappy about it.
Tanukix i wad wondering if am alone in this the chapters gt locked like 66 of them in genius doc. BBM 
CKtalon I feel like this is a big problem since alot people are starting to complain about it and like i said before i dont have tje logs for every chap i unlocked since alot of it was older than 6 months.