FPS drop and increased GPU load in Max 9.1.4/9.1.5 vs 9.0.10 (Jitter)

I've been working on a large Jitter-based project for years with zero issues, running on Max 9.0.10. Everything was stable — good FPS, predictable GPU load.

Then I updated Ableton Live, which brought in Max 9.1.4 and later 9.1.5, and things fell apart. On the exact same project, with nothing changed on my end, the frame rate started dropping and GPU consumption went up noticeably.

I tried disabling the new "Global Context" preference to see if that was the cause, but it made no difference.

What actually changed in the Jitter/GL rendering pipeline between 9.0.10 and the 9.1.x line? Has anyone else run into this?

Thanks!

juan cruz