G0 command issue

This is an upgrade to a recent bugfix 2.0.x and it previously worked.

If I reset, home all and issue a G0 x150 y150 command the drives buzz, the head goes no place, and the position indicators all update to 150 150.
If I issue G0 x150 it goes to X150. I then issue G0 Y150 and it goes to Y150, and the position indicators all update accordingly.
Does the same with scripts
Using Repetier-Host


Other movement seems to work properly.
this is a CoreXY machine and that is set.

It Quick homes OK.
babystep is OK


I believe the config files are all correct, but something obviously is not.

... too fast diagonal move, so it stalls?

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Viktor
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Call for the project "garbage-free seas" - [reprap.org]

I never enter Fxxxx so it is at the default speed which is pretty slow.

Try lowering the X and Y max feedrate( which i believe G0 moves at) in config.h / eeprom

it mysteriously stopped doing that after a few resets.
though periodically it will appear lost and do other strange things after a reboot.
It is almost (maybe actually) like some variables are not getting initialized properly.