I have 2 projects that I recently migrated to .com, one with no problem (https://travis-ci.com/github/Autarkysoft/Denovo) and the other with problem (https://travis-ci.com/github/Coding-Enthusiast/FinderOuter).
The github notification shows two buttons, previously one was direct link to travis-ci.org build and another to github actions with the same URL but now they are different and one also failed just now.
It seems like the project is being built on both domains:
Same commit being built on .org but cancelled: https://travis-ci.org/github/Coding-Enthusiast/FinderOuter/builds/741306651
Same commit being built .org and passes: https://travis-ci.org/github/Coding-Enthusiast/FinderOuter/builds/741307141