[MauranKilom]

MS Teams is just as terrible.

If I accidentally fat-fingered e.g. the \ key at the end of a message ("Got it!\"), I want to

1. press the up key

2. press backspace

3. press enter

to delete the last character in the last sent message.

But unless you actually wait at least a second after step 1, the UI is so sluggish in starting the edit of your last message that you instead get "please type a message to continue" because you pressed enter while the New Message text box still had focus.

Things are much worse if you want to do anything more complex. Say, capitalize the first letter of the last sent message (up, home, delete, type capital letter, enter). Usually results in complete gibberish, like appending the capital letter to the message, or sending it in a new message (depending on how fast you are).