If you are using different track lengths per pattern, changing them while the sequencer is running can cause pages to get out of sync.
I recorded a quick video to show this behavior. It might be working as designed, but it certainly caused some skepticism of the DT’s midi capabilities at our last 2 writing sessions.
Now that I know what’s causing it, I have not run into the problem any more.
Adding that this was answered by Elektron, and it is working as designed.
It’s because I was using M.LEN of INF.
If I set it to 64, the example I did in the video works fine.