PDnoob:
Welcome to the PDVD Forum. It is not a known issue that I know of. I am running PDVD13 as well.
Did you recently upgrade a video driver? I did have an Nvidia driver go in "sideways" about a year ago and it caused BD quality issues on playback. I did a clean install of the most recent Nvidia driver and that solved the problem for me.
Do you have the latest version of QuickTime installed? I don't know about PDVD13, but I know PowerDirector relies on QuickTime for some of its codecs.
If you post a dxdiag file, we might be able to determine if it is an issue related to your computer configuration, if my first two suggestions don't help you solve your issue.
Hope this helps. Have a great day.
Regards,
-Phil
Windows 10 Pro x64
Dell XPS 8930
Intel CoreT i7 (4.6 GHz)
32 GB DDR4-2666 RAM
1 TB PCIe -x4 SSD
NVIDIA GeForce RTX 2060
PD14 Ultimate x64, 4207
CD4 Ultra and AD6 Ultra
Bleeping Computer Malware Response Instructor