Newline gets inserted at wrong location on Firefox Developer Edition (143.0b1)

[bentsai]

Steps to reproduce:

• Create a card (Test)
• Click on card, which places cursor at the end of the text
• Hit Enter
• Observe that est gets put on the next line in a new card.
• Observe that the text view remains Test

Expected behavior: A new card is created with cursor at the beginning of a blank card.

Safari exhibits similar behavior, but not exactly.

[niedzielski]

I can repro on Firefox v128.13.0esr. thanks!