DriverTest have same behaviour here.
But I noticed something funny with feeds.
And I have pulsing speed set at 35kHz. In diagnostics shows me it pulses at 49.5kHz.
Same for 25kHz setting it pulses 35kHz, for 45kHz setting it pulses at 65kHz.
Speeds are faster for this ratio in Jog and Feedrate.
Tried DriverTest it passes OK.
Also tried NormalDriver.bat and SpecialDriver.bat with same effect.
Tried to reinstall and still too fast.
Please Experts help me.