I just did another quick test to see if the RMS theory would hold true at different values.
I set VRef to 0.5v and went with full step mode. Measured current was 0.515A. —> (0.515A x √2) / 0.71= 1.02A.
(VRef x 2) would give 1A.
Seems to work but whether or not it’s a coincidence I don’t know.