Model Mesh cache never cleared after demo playback causing crash

[betsruner]

Whenever playing back a demo model mesh data is loaded and never unloaded. Playing back multiple demos consecutively eventually leaves too much data in the model mesh cache which causes the game to crash. It's possible to observe this directly by using the in-game command cache_print_summary.

Output of the command before playing back any demos:

Output after playing back a demo:

By the time you've played back about half the single player campaign it will crash on the next demo:

Here is a video of the issue. In the video I'm playing a bunch of very short (1 second) demos which cover the first 32 maps in the game. When I go to play the demo of the 33rd map the game crashes.

Model.Mesh.Cache.issue.mp4

The model mesh cache doesn't grow from playing demos of the same map repeatedly. It only grows per new map played back. Issue exists on both windows and linux versions of the game.