Canceling rescheduling timer not working when having multiple actors per room

[LukasK13]

I'm having a set up with two actors in a room with send_retries set to a value greater than 0.
Using this setup, a resending callback is registered with appdaemon for every actor here.
However, after the state has been successfully set, the time is not cancelled successfully here. Instead, appdaemon shows the following warning.

WARNING AppDaemon: Invalid callback handle '975ea51edf6e472d989d7cce2b02302f' in cancel_timer() from app schedy

A workaround for this issue is to set send_retries: 0 or to have separate rooms.