[fian]

It is related to italics.

I often use _phrase_ to italisise. This seems to trigger the left/right arrow key bug semi-regularly. This fix is to find the Teams icon in the Taskbar, right click and Quit.

Then restart Teams.

[hbn]

Alternative solution:

> find the Teams icon in the Taskbar, right click and Quit.

...and never open Teams again!