Using OpenGL on Windows with a display scaling factor seems to have issues. I’ve had a similar problem recently. No solution so far, but there’s some more info in this thread:
It might be related to what graphics card you’re using. So far I’ve not been able to find a solution. The only thing putting my mind at rest is that this will happen with every plugin using OpenGL, not just yours. So hopefully, users will disable OS scaling or find the option in their host to disable scaling for plugins (if there is any).