Sanctum Showdown Glitch?

Apologies if I’m late to the party and this is already been discussed. I’ve noticed in sanctum showdown that my scrolls will get to zero but will not add to my total even if I have zero. I theory tested this a couple times by buying a scroll for 40 gold or buying it from the shop and as soon as I buy them, the two that were due to me add to my total and I get three or four respectively.

Has anyone else noticed this and have a fix?