To shift work spaces my default keyboard short cuts are ctrl F1 and ctrl F2.
Yes but if you would use modifier keys (CTRL + ALT + arrow keys) you would probably have the same problem. I tested KDE and it had the same problem but when i temporary changed keyboard shortcut to something else i didn't have the problem anymore. You probably still have the problem or if u just use arrow keys to move the part and blender navigation is enabled then you can reproduce this problem?
P.S. I use blender navigation because it just feels right and that middle+left click to rotate in CAD navigation is just off.