I closed the game while in the shop, more specifically right after opening a spectral pack. When I reopened it, I was greeted with this (see first image).
Well after some time, in a different run, I reopened the game (once again into the shop, while in thw middle of opening a tarot pack), and once again I saw the shop and the tarot cards at the same time. However, unlike the last time, the shop was located below where it should be.
I didn't get a screenshot, but imagine that the top of the shop was in the middle of the screen.
In that state, I was able to click in the reroll button, but not on the shop items or the 'next round' button.
So I tried closing the game and reopening it, and after doing so the shop just... Disappeared (see second picture). I think what probably happened is that it went further down or smth, although that doesn't explain why the card holding slot is showing up.
I think the problem comes from reopening the game while in the middle of opening a pack, although there has to be something more to it as this problem didn't happen in previous times when I have opened the game while opening a pack.