Bug TMP_InputField behaves incorrectly when placed horizontally in 3D canvas

I am placing an inputfield in 3D space.
I create a canvas, make it a world space, and assign the main camera to it.
We place the TMP_InputField there.
Set the rotation of the canvas to 0,0,0,
TMP_InputField rotation is also set to 0,0,0, it works fine.
However, if I rotate either of them to rotation 90,0,0, mouse operations for input such as caret and select do not work well.
After much experimentation, I think the rotation setting may be upsetting the mouse input.
It is not completely inoperable, but it is clear that the behavior is not correct.
I would like to position the input field horizontally as shown in the image.
Text Mesh Pro 3.0.6.

 

Self resolved.
I don't know if this is a bug or if it is spec'd that way, but by setting the rotation to 89.99 degrees instead of 90 degrees, it worked fine.
I suspect that there is a part of the original program that calculates 90 degrees as 0 or 180.
If the rotation was shifted even slightly by 0.001 degree, it worked correctly.