Hang when looping (FIXED)

[snooks]

I have a project where looping around hangs Reaper. You need to let it loop around 10 times or so for it to happen.

There is a send for a sidechain from track 12 to track 4. On track 4 there is an instance of ReaComp. When I disable ReaComp the hang does not occur. When I copy just those tracks to a completely fresh project it does not occur either.

The hang also does not occur with a fresh install of Reaper, so it might be an option somewhere or other that causes it.

I've attached a project that's stripped down to a bunch of tracks with no 3rd party VSTis or anything where it can be reproduced.

edit: I should add that the symptoms are that RT CPU shoots up (to ~300% here). If you catch it climbing and stop play a hang occurs when you try to press play or stop afterwards.