DSHOT RC failsafe bug


I think I’ve found a bug. When I set SYS_USE_IO 0 for Dshot, I get an RC failsafe as soon as I arm. If I set it back to SYS_USE_IO 1 the issue goes away, but I don’t seem to have any control over the motors via my remote connected on SBUS. This is on a black cube. Any ideas?