Been battling weird issues with track matte's all day. All have to do with Precomps that have collapse transformation switched on. It seems to be causing weird time shifting issues with animated track matte's inside of the precomps. Tried the sette matte effect, and had similar intermittent issues.
My current work around is to shift the animated track matte's forward in time 17 frames within the pre comp. Is anyone else having this issue. I'm on AE versions 18.104.22.1684