Most likely is your Webnovel site changed to m.Webnovel.com, as in the Mobile Webnovel Version. if you delete the "m." in the url then it should go back to normal (even if the Update Mark for the New Chapters in Libary is still Missing/Bugged).
Well it is bugged for now and Webnovel mixes Webnovel.com and m.Webnovel.com up.