On newer versions of the plugin Play Once is forcibly applied, although the file clearly states that it is "loop": true. The other animation file doesn't have this problem, but I need this particular file with my 400+ animations. What can I do to fix this automatically instead of manually? Also, if I "fix" it manually, what prevents it from breaking everything again after restarting the software?

Animations here
Model here

• When uninstalling the geckolib plugin there is no problem with incorrect "play once".
• Full reinstallation of plugins and blockbench did not help

I'll look into the plugin issue - however in this case it shouldn't matter

In Geckolib3, the animation json's loop type was completely ignored - it's all determined by what loop type you use in code

If anyone needs a fix, it looks like this

That doesn't do anything
Geckolib accepts both true/false & "loop" options

Same problem changing from true to loop helped, but doing it all manually is very inconvenient.

If you have Notepad+ you can replace everything in bulk. "Replace All"

That doesn't do anything
Geckolib accepts both true/false & "loop" options

It has helped me personally. Maybe in newer versions there is a problem with "true". Because in old versions it was not like that. This error appeared about 1-2 weeks ago. I would also like to remind you that this problem only appears when the geckolib plugin is installed. In pure Blockbench this is not the case.

Oh with the plugin

Sorry I misunderstood - I thought you meant with geckolib itself

Same problem

changing from true to loop helped, but doing it all manually is very inconvenient.

I fixed the problem simply by installing the old plugin version 3.07
here: https://github.com/fadookie/geckolib-plugin?tab=readme-ov-file

Incoming fix

Sorry it's taken so long