Python3 - code for recorded hangs

[OldShaterhan]

Hey guys, I'm running instance of this code, but unfortunately, for some reason when I run it in Python3 for old data (-r switch) it suddenly hangs on random date and time and doesn't finish it work. When I break it by Ctrl+C from traceback I see it hangs on band.waitForNotifications(0.1), what executes btle.py line 560, then 407 and 342. Have anyone idea how to solve this issue?