In the new beta version, it is impossible to work with HLG files

[andrijan.dsgn]

When working with video files in HLG format, the computer becomes heavily loaded and completely reboots on its own. This issue was not observed before. As a result, it is currently impossible to open an already completed project in the older version due to incompatibility. Does this mean that the entire project now needs to be redone in v24?

[Ann Bens]

You can open a 25.2 project in the 25.1 version.

Open a New Premiere Pro Project on an Older Version -Mac - YouTube

Open a New Premiere Pro Project on an Older Version - Windows - YouTube

[DaciaSaenz]

I'd love to help you get to the bottom of things. 
First things first...

• Can you please share your system specs, GPU, and OS version? 
• Can you reproduce this issue in the latest release version of Premiere Pro 25.1
• Can you please share a log so devs can take a peek for any suspicious clues? 
  • Start an app session 
  • Get into the bad playback state 
  • Navigate to Help > Reveal Log Files and send those files over. 
• Does this happen with any other types of files?
• Screen Recordings also help a great deal to be able to see what panels you have open, etc

Out of curiosity, have you tried the new Media Intelligence feature? 

• Can you please go into Prefs > Media Intelligence & Transcripts and turn Visual Analysis off by unchecking the box? 
• 

• Does this improve the lagginess you're seeing in the UI?  

Thanks for reporting this issue and for any further detail you can provide,