When I switch to the 'Oblique View', it keeps reporting errors

[Moonsic]

It will be triggered every time the crosshair is dragged. Could you please fix it?

[PaulHax]

Thanks for noticing. Do you have the time to look into it?

[Moonsic]

Thanks for noticing. Do you have the time to look into it?

I'm sorry, I'm afraid I can't do it. I'm quite busy, and I'm not very familiar with code either.
The version from last year didn't have this problem.I also only saw the new version recently.