Tempo changing to default for no reason

[Billie Page]

Hi guys, sorry if this has already been covered! I'm a newbie to ableton and am tearing my hair out with frustration this afternoon as when I set the click tempo in a session it'll record at that tempo for a certain amount of time then just randomly drop back to the default tempo.. For example I'm recording a track at 135 bpm, everything's going fine, then at say 49 secs in it just drops back to 120bpm for no reason. I've tried a few different things but can't get it to stay at the set bpm...?? Pease help!

[Greenapples2019]

It’s quite often due to there being some tempo automation in the set. In arrangement view, press A and on the Master track select Tempo. If there’s any automation just delete it and you should be fine.

[Billie Page]

Thank you so much! I'll give that a go!