MQTT events are not fired after toniebox is playing for longer time

[flhauff]

[as honeybee told via telegram that this may be a bug in tc, I create this issue]

I have a custom tonie that plays music for over 4 hours. If the tonie has played for ~1,5 hours and I remove it, I do not get an MQTT event. If I then put it back onto the box I get two events directly after each other: one for removing it and one for putting it back on.
If the playing time is shorter it works as expected.

Unfortunately I can't tell exactly how long it takes until it stops working and if it is consistent. I can try to narrow down the time span if necessary.

The shortest time where it didn't work: 1:42h
The longest time where it did work: 1:24h

Maybe it has something to do with the 90min Kreativtonie limit?