I've installed a virtual machine with Debian testing (Buster), KDE
Plasma, and kamoso, and I cannot reproduce the bug there.
In testing (buster), when I start kamoso, the program launches well. It
shows a dancing banana because my VM has no access to the laptop's
camera, but I think that is irrelevant to the problem.
My question now is if it's possible to backport the fix to Debian 9
stable, because the program is unusable in Debian stable. Or remove
kamoso in Debian 9, and maybe backport the new version to
debian-backports? (I'm not sure which is the policy here).
For what I've searched and found, looks like the commit fixing the
problem is this one:
Laura Arjona Reina