Same start frame to match AE timeline with a PNG sequence?

When opening the Mocha pro plugin in AE, Mocha has a different start frame. I am using a png sequence for roto work and I suspect his may be the issue.

I’ve read some similar topics on this forum about how Mocha AE reads the original clip and Mocha pro reads and writes from the timeline. I’ve tried using Mocha pro on a video clip and the start frame is the same as the timeline.

Is there any way to get Mocha Pro to have the same start frame for a png sequence?

Can you try precomping the PNG sequence with all attributes into the new composition and then checking the checkbox for trimming the timeline to the comp timeline when you do?