Disappearing favorites

I don't know if this was a problem for anyone else, but many of my Favorited doujins have disappeared from my list and they continue to disappear every time I add a new one to the list. I went back a searched for a few that I know I archived in the past and it says they are still in my favorites. Is anyone else noticing this too or has this been going on for a while? I've only began to notice and its a bit frustrating.

Which ones are disappearing? Being a little more specific and giving more detail can help identify the problem.

I can't name many due to them being favorited a while back. I used the Highschool of the Dead "Kiss of the Dead" series as an example, as well as the series Sweet Hearts. Both were archived in my Favorites but now they are gone.

Neither are in your favourites from what I can see (just to give an outsider's perspective)

Don't know if this'll work, but you tried unfavouriting then favouriting again?

Good news. They are back in my archive, surprisingly though because I didn't unfavorite them like you suggested. I think it may have been because I've been using Fakku on my phone more than my computer and the issue may have been coming from there.