Video streaming freezing

Sometime, the video stream of the drone is freezing and I get this logs messages:

W pdraw_dmxstrm: failed to get an input buffer (-11)
[h264 @ 0x7f67d5414aa0] Reinit context to 1280x720, pix_fmt: yuv420p
06/08/2019 14:13:18.730479      _process_stream                 Video sink has already been flushed ID 1

Is there anyone who would have an idea to fix that ?

Thanks

Hi

What is the firmware version of your Anafi? Do you use a simulated or a physical drone?

Thanks

Is the firmware version 1.5.6. I have this problem with the physical drone. It does not happen with the simulated.