Using -c:a copy argument results in video bitrate loss

[Omarock92]

description I'm trying to use -c:a copy as a ffmpeg argument to copy the source audio bitrate (works), but it's resulting in massive loss in video bitrate compared to using no arguments.

system Blur version (e.g. 1.8): 2.42 OS (e.g. Windows 11): Windows 11

steps (optional) Set -c:a copy as ffmpeg filter in advanced settings.

screenshots (optional) Screenshots if they help describe the issue.