What can cause clips to become out of sync with the bar markers? (I didn’t change the tempo.) – Tracktion Forum

Hi folks. Today, I found that the tracks in my project have become out of sync with the built-in metronome and the bar markers. It’s not the first time I’ve experienced this. What can cause that to happen? I have not changed the BPM, since I started the project. The only thing I did, before this happened, was I shifted most of the tracks, several bars to the right, simultaneously. (I did that by holding the ALT key and dragging a rectangle to touch all the clips I wanted to move.) After doing that, I can no longer get the tracks and clips to conform to the bar markers and downbeats. Something must have changed, that I am not aware of. Any suggestions, anyone?