Upon loading a large project, the interface freezes with no preview available, and the command line outputs the following two errors:
ERROR 18:50:17 pipeline pitivi+utils+pipeline+pipeline0 _async_done_not_received_cb: we didn't get async done, this is a bug (../../app/lib/pitivi/python/pitivi/utils/pipeline.py:299)
ERROR 18:50:17 pipeline pitivi+utils+pipeline+pipeline0 _recover: Pipeline error detected during playback, resetting -- num tries: 0 (../../app/lib/pitivi/python/pitivi/utils/pipeline.py:469)
This occurs running the latest flatpak.
One project this occurs with is available here as a tar: https://mega.nz/#!2dsX0TRQ!lhVB0vFgoqmlFLYYqT0muWqMBt8g7HfZhiNqGFFjS8I
Heads up: It's more than 7 gigs, so downloading will take a while.