When I edit cards in the Edit menu (e hotkey) and finish editing, i exit, and want to see quickly see the front of my card. When doing this, i frequently run into a bug where my UI turn black, without any text displaying. (the text does seem to be still selectable.)
The combination I exit the menu, and that causes the bug is:
「cmd+Enter → space」in quick succession.
The bug remains active even on other cards, until i enter another menu.
As an addition:
i think this problem has only started to exist recently.
I think i have never encountered it in over a year of daily use before. But since 1 or maybe 2 weeks ago, it occours frequently. I encounter it at least once almost every card i edit (aka every new card)
Since the app hasn’t received an update recently, it may be related to an iOS update. You might also want to try turning your device off and then turning it on again - that has occasionally helped users with webview-related issues.