I think it works like that
Well mine is like that too update notifications usually notify later in the evenings
I think everyone receives notifications everyday at the same time. That means that if your notification time is at 6am and the manga you follow has updated at 4am you'll still only receive the notification at 6am, and if a manga updated at 7am you'll receive the notification at 6am of the day after
ohhh that makes sense because all of my notifications come at like 10 am or 11 am i'm not sure which one it is, i just never made that connection
is it just me or do the notifications that mangas have been updated come a few hours after they've been updated because i saw that one of the ones i'm currently reading was updated on the main page so i look at my notifications and it hadn't said anything then a few hours later i finally got the update