Replay Buffer Options Are "Locked" When 'Rate Control' Is Set To Lossless

Operating System Info

Windows 11

Other OS

No response

OBS Studio Version

30.1.2

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/kOWn0IxmE7ed4Bq5

OBS Studio Crash Log URL

No response

Expected Behavior

If I enable lossless 'Rate Control', I should be able to freely modify the replay buffer accordingly without extra steps (such as temporarily disabling lossless 'Rate Control').

Current Behavior

Because of this issue, I have to set the 'Rate Control' setting to VBR, CQP, or CBR to be able to freely modify, the 'Replay Buffer' feature, which is extremely inconvenient. Otherwise, I am able to use the set settings and use the replay buffer losslessly without issues. You can view the OBS Studio Log URL to see my settings for the replay buffer.

Steps to Reproduce

1. Have a compressed (like CQP) recording option.
2. Set up the replay buffer.
3. Set the 'Rate Control' to lossless.
4. Observe the replay buffer no longer being able to be changed or modified.

Anything else we should know?

Please don't actually disable the replay buffer for lossless rate controls, rather it should be allowed to be used losslessly. I have been actively using lossless rate control for a while now, and it is extremely useful for me, as I manually compress the replay to my own desire and quality needs. I greatly appreciate high quality.

Start by reproducing the issue in OBS Studio 30.1.2 on Windows 11 using the listed replay-buffer steps and the attached log. Trace the settings interaction between lossless Rate Control and Replay Buffer options. Done means replay-buffer settings remain editable while lossless rate control is enabled, without breaking lossless replay recording.