All I know is that the problem is fixed with betas 2.15.13 (3) and 2.15.13 (4). There are however bugs with the new player as I reported in the beta section of the forum. I don’t know when this version will be out as an officicial release.
Some problems I have with the new reader in this thread:
The new motion detection mode is not quite up to date. Movements are detected in areas that should be ignored.