Recently, Steam has being doing various maintenance, causing their server loads to go up and down. In return, this has effected client downloads upon joining servers. Unfortunately, there are no server configurations we can change to fix this until Garry's Mod releases an official update. Rubat/robotboy655 (Garry's Mod head developer) addresses this issue here: https://github.com/Facepunch/garrysmod-issues/issues/5409#issuecomment-1509884225.
However, Rubat has informed everyone to switch t