I haven’t spotted this noted anywhere - apologies if it’s known
Go to Tempo track (Control + T)
Note: Tempo track on, metronome icon lit
Highlight a handle on tempo line
Try to type into tempo box = reverts to previous tempo
Switch OFF tempo track, now you can type in a new BPM, but when switching tempo track back on, the new BPM is forgotten.
Tempo can be set by dragging handles on display line - but this is more fiddly. I am pretty sure this worked in C4. Has there been a change in behaviour I have missed, or has this gone buggy?
ps EDIT It works correctly in the info line, but not in the top toolbar