MP does not play telemetry logs anymore

Ground Control Software Mission Planner
1

I can load a telemetry log but the Play button does nothing.

MP 1.3.68
ArduCopter 3.6.10

2

Please confirm that you are loading a valid t log

3

I have made another test. The issue occurs if connected to the UAV only.
So maybe it’s my fault, sorry.

4

Yes you can’t play a log with a connection active