Bug#945618:

[thomasw]

I built some kernels from mainline to narrow this down exactly. I don't 
reproduce in 5.3.10. I reproduce in 5.3.11. Not sure if something was fixed in 
the kernel that exposed an Orca/Speech Dispatcher bug or if this is a kernel 
regression. Hopefully narrowing this down helps some. 5.3.10 to 5.3.11 is very 
few commits.