I believe I've finally realized how to reproduce this. It seems the "mixer bus focus jump" occurs when the play-head encounters the beginning of the 4th bar when a clip (on the selected track) is 4 bars in length.
For starters, the following defined loop range will NOT trigger the mixer focus jump behavior because loop-end is placed at 4.4.000.
The appropriate audio bus is highlighted and focused in the mixer...
Now, we use the mixer scrollbar to scroll right until the APR1 bus is out of view...
Start playback. The looped range will loop as intended and the mixer's focus will stay put.
Now back in the arranger window, right click the timeline on 5.1.000 (or anything after) and reset the loop (I bind Shift-R to Transport/Loop Set).
As soon as the play-head encounters 5.1.000, the mixer will jump the focus back to the APR1 bus previously mentioned.
With playback still active (looping), you can repeat the "focus jump" by using the mixer's scrollbar to move the APR1 bus out of view. Every time 5.1.000 is encountered, that bus will jump back into view.
Update: Have spent the last few minutes trying to find evidence of a pattern. No luck... thought it was looking like "when looping, focus jumps when play-head hits length-of-clip-minus-1-measure or something. I can't make that pattern stick however when trying it in various other places. Therefore, there must be some other variable. Figured I'd just post what I've noted just the same as the information may inspire some thought or ideas.
I believe I've finally realized how to reproduce this. It seems the "mixer bus focus jump" occurs when the play-head encounters the beginning of the 4th bar when a clip (on the selected track) is 4 bars in length.
For starters, the following defined loop range will NOT trigger the mixer focus jump behavior because loop-end is placed at 4.4.000.
The appropriate audio bus is highlighted and focused in the mixer...
Now, we use the mixer scrollbar to scroll right until the APR1 bus is out of view...
Start playback. The looped range will loop as intended and the mixer's focus will stay put.
Now back in the arranger window, right click the timeline on 5.1.000 (or anything after) and reset the loop (I bind Shift-R to Transport/Loop Set).
As soon as the play-head encounters 5.1.000, the mixer will jump the focus back to the APR1 bus previously mentioned.
With playback still active (looping), you can repeat the "focus jump" by using the mixer's scrollbar to move the APR1 bus out of view. Every time 5.1.000 is encountered, that bus will jump back into view.
Update: Have spent the last few minutes trying to find evidence of a pattern. No luck... thought it was looking like "when looping, focus jumps when play-head hits length-of-clip-minus-1-measure or something. I can't make that pattern stick however when trying it in various other places. Therefore, there must be some other variable. Figured I'd just post what I've noted just the same as the information may inspire some thought or ideas.