Wrong coordinates for very big screen images

Hello,
We observed UITARS 1.5 7B giving wrong coordinates for big screen images (3840x2100). When we resized the images to be smaller it worked correctly.

What do you recommend for the max image sizes? Thank you.

Start by reproducing the coordinate error with the reported 3840x2100 images and compare the results with resized versions. Trace the image-input and coordinate-output path to identify where large dimensions affect behavior; done means the supported maximum image size is established or the issue is reliably reproduced with a focused test.

Written by the indexing model from the issue text.