WL hangs after exit if plugin is locked in Master section

WL could not be re-opened - the process WaveLabPro9_5.exe kept on running after exiting and had to be killed manually. So I did some testing and found out this:

if plugin in Master section is locked (right-click checkbox Lock) WL does not exit properly and needs to be killed manually.

Not sure if ALL plugins are doing it but for example these definitely are:
Brickwall Limiter
MBit+ Dithering
Voxengo SPAN

And for example these are OK:
Peak Master

Confirmed. I see similar here.

Known issue fixed in upcoming 9.5.50

I see…
Is it possible to check these “known issues” anywhere? Would save me a lot of time…