Hi,
I am having some problems with the rotation on the y-axis. Whenever I enter “180” in the y-axis rotation field, the x-axis and the z-axis change their value to -180 and the y-axis becomes 0.

Internally the orientation is not stored as rotations around different axis (Euler angles), but as a transformation matrix. The user interface then just translates between those Euler angles and the matrix form, and same orientation can be expressed in multiple ways using the Euler angles. In this particular case you get back a different representation than what you input, but the orientation is the same.