The next day after I posted the fix, it happened again.
Removing the composer extension and the data along with it then reinstalling and rescanning was still the fix for me.
This solution works for me because I only have 1 app on this server, others with more may not find this workaround...
Actually, issue seemed to have resolved itself by removing the Composer extension, then adding it back and rescanning.
Leaving just in case this happens to anyone else
I am using the Laravel Toolkit which has been really great!
All of a sudden I am now receiving this error on the Installing Composer dependencies step when I run the Update feature on the Deployment tab:
I've tried the recommended fix here, along with trying to run the composer global command...