Nonsense error when increasing LightSource angle?

Question

My project has a Light Source and a Sky Sphere Blueprint.

The rotation on the y axis (Light Source) defines the position of the sun (Sky Sphere Blueprint).

Character Blueprint (increases by 10 degrees on the y-axis rotation of Light Source, the updates the position of the sun):

When you click the button (Angulo, circled in pink), the angle increases by 10 and works to a certain moment:

Image with angle increased by 10:

When it reaches 100 degrees, it starts to go wrong. Each time I click the button it goes from 90 to 100 and vice versa in an infinite loop:

I've already tried to turn it around, subtracting instead of adding, but at one point it also gives error (in the case with 110 degrees).

Answer 1

Based on @DMGregory comment and also on his answer given in another question.

Question link where he gave the answer that helped me:

Why rotating an object only on its local X axis result in sudden 180 degrees changes in Y and Z axis rotation values

I stopped using the value coming from the rotation of Light Source. I have stored the desired value in a variable and set it directly in the rotation of the Light Source.

First I did a test using a switch and it worked:

To optimize this, I used a structure and a data table: