Yeah I had this problem too a few months ago
Except it says I wasnt subscribed to addons, it only loaded 4 pages of addons, with the rest of the pages not showing
Every time I started a game, only the addons on those 4 pages would load
Unfortunately, this just randomly stopped happening a few days later, and I dont know what I did, so I cant really tell you how to fix it, but atleast you arent the only one whos had this problem.