A bit of a long shot here, but are there any known issues with the mipsel-unknown-linux-musl Tier 2 target and thread::sleep? I'm seeing some crazy behaviour where sleep appears to be returning at 14ms where I'm trying to have it sleep for 18ms. I'll keep digging, but just in case... Thanks.
Turned out that the mipsel target was fine, and it was some other bug in my code. 