SC2 crashes on mission load

Hi all, anyone else had the problem of LotV mission 18 I think (The Host) and it crashes when the loading bar hits half way? Crashes to desktop.

I’ve tried scan & repair, deleting SC2 and installing it again. Every other mission on every other campaign works fine, no crashes. So clearly scan & repair doesn’t repair a mission file if its corrupted.

Anyone know of any fixes?