Has anyone filed a bug about this? If so, please post your bug number.

Not just beta - this went straight into the final release. This affects the parallel tests even more as the typeText uses 300% CPU alone for only 1 simulator, which make it almost impossible to run tests on more than 2 simulators in parallel.

Contacted the Apple support 2 times asking for these details and they never replied.

Same here, the issue is present with 11.0.1 as well. So far no solution found and the mac is stuck.