[Bug] reset_angle() without arguments during hold gives unexpected movement

[laurensvalk]

Describe the bug
When used without arguments, reset_angle() should reset the angle to the absolute marker.

But in some cases while holding, it jumps to zero.

To reproduce

from pybricks.pupdevices import Motor
from pybricks.parameters import Port
from pybricks.tools import wait

motor = Motor(Port.B)

motor.run_target(500, 90)
motor.reset_angle()
wait(1000)

Things do seem to work correctly when giving an angle argument or when using a different stop mode.

Expected behavior
With no arguments given, the angle should do this for positive angles:
motor.reset_angle(motor.angle() % 360)

[laurensvalk]

This was reported by Tammo, who does not have a GitHub account (yet 😉).