I've had a CNC machine and exceeded the speeds with 10%. After a few months the precision positioning of the machine was gone. Replaced the stepper motors and never gone beyond the advised specs of the machine. Now still working good after 5 years.
So I stay with 90mm/s travel speeds and 55mm/s printing speed as mentioned by the manufacturer. What I ment to say this had to be the standard settings of this machine. In the update it's now fixed I noticed.
So future unclear problems solved.