Plugin doesn't give correct rotation value for some cases.

[charindaNanayakkara]

Here I'm considering 360 degree rotation. Rotation values are correctly given for until we rotate it up to(rotated clock wise ) 4800mils (270 degrees.). But After the point it suddenly gives incorrect rotation value. Even for the small rotate angle its return something unacceptable value from radian. Any suggestions for the issue.
Steps to replicate

1. Create polygon and rotate it up to angle < 4800mils. It returns correct angle value.
2. Then rotate the polygon(from current position) again up to angle >4800mills .
   Result : it return very high rotation negative value than expected.