Per https://discord.com/channels/857305113936134204/857724063903252530/882034356246437929 from @kordumb.
I reproduced too on iPhone:
- Start creating a card
- Hit
[[
to invoke tag browser - Tap on a tag
- Hit Return
- Observe that a new card is created that is connected to the first card, and the card is indented. This is behaving as if you hit Shift-Enter on desktop, but you didn’t.