Mail Side Preview Pane Width Resets
Desired Behaviour:
Dragging the Mail side preview pane to be sth like a fifth of the screen to the right. Expecting it to stay that way.
Observed Behaviour:
With no apparent reason sometimes after switching away from and back to the Mail app, the side preview pane resets its width to something like a third of the screen, which also messes up the width of the message list columns.
Question:
Any idea what's going on and/or how to fix this?
MacBook Air, macOS 13.5