@vlord3 this problem is fixed in the latest Plex Media Server beta, 1.30.0.6442
I just tested on my Mac against your sample that failed with older ones.
Here is the command I used for my own reference.
FFMPEG_EXTERNAL_LIBS='/Users/nibbles/Library/Application\ Support/Plex\ Media\ Server/Codecs/583b3e4-4434-darwin-aarch64/' "/Applications/Plex Media Server.app/Contents/MacOS/Plex Commercial Skipper" "--ini=/Applications/Plex Media Server.app/Contents/Resources/comskip.ini" "--output=/Users/nibbles/Downloads/Archive" -t "/Users/nibbles/Downloads/Archive/The Three Stooges (1934) - S1946E07 - G.I. Wanna Home.ts"
[snip output]
7132 Frames Processed
Commercials were not found.
@anon18523487 another win for Plex, thank you