How did you fix self, speaking of which? Could be related to that. I may be able to help look into it with some points of reference.
This new issue is caused by self inside a bound method reasonably being the self from method call, but I have not rolled out a new version yet since I found more things to fix.
You can fix this specific thing by going into GMLive_vm_call ➜ vm_group_call_on_func_literal_lf and changing
live_custom_other=self;
to
live_custom_other=other;