/t5/premiere-pro-bugs/cephtmlengine-crashes/idc-p/15193205#M46648Mar 05, 2025
Mar 05, 2025
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Each extension you open during a given PPro session, is handled by an instance of "Adobe CEP HTML Engine". I think that, if those extensions display additional dialogs, those might also get their own instance.
Note: Just because an extension gets CEP HTML Engine to become non-responsive, doesn't mean it's the extension's fault; something could be going wrong in their interactions with PPro.
For troubleshooting purposes, you might consider using just one extension at a time, and seeing whether you can provoke one of the hangs you've been seeing.
Also...We believe you, and Motion 4 must say (in its manifest file) that PPro is a supported host, or we wouldn't load it. 🙂