This has happened frequently. Suddenly all playback stops for everything. Timeline will scrub, but it cannot play until I restart the machine. Nothing else will play, even outside of Premier, so it's crashed a Windows service.
This time I'm editing an hour long multicam sequence with 4 sources. In the master timeline, I made two cuts and ripple deleted the section in the middle. Then it refused to play.
It's happened before, often when trimming a clip.
See what you can find. Do you know what service may be crashing? I could dive into services and restart it.
Using nVidia 2080tI with current studio driver.
System info
Application: Premiere Pro (Beta) v25.3.0.47
OS: Windows v10.0.22631, RAM: 63.82 GB GB, CPUs (logical): 16