It has been proven multiple times that this is not what happens. Riot themselves even confirmed it.
##Riot Sparkle:
Hi! We looked into this one pretty extensively when it was first reported and found that it Biscuits are not affecting /remake. There are other factors that could block the /remake (such as the afk player moving, etc.) but I can see why you might think it's some weird interaction with Biscuits because the timing lines up so well. Receiving other items, such as Minion Demats, Viktor's item or a free Stopwatch also do not have any impact on /remake (we went ahead and checked all of those ones too, just to make sure).
Riot Gin specified that the player attempting to reconnect is what causes the remake to fail.
Biscuit is not preventing remakes
The player attempting to reconnect does
Sometimes they manage to "reconnect" and get into the loading screen, but stop there and don't manage to load into the game.