Manually changing OCR clipping region

I’m facing a certain Problem during a quite OCR-heavy task: I have to click in order on a column of Images, which can be found without problems using the Find Image Matches activity, resulting in an IEnumerable of UiElements. Nonetheless, the Position of the elements is only valid until the first click, because then the first entry will automatically unfold and shift the rest of the elements downwards, invalidating the original positions.

As they shift by a fixed distance, I thought about correcting the Clipping Regions manually by adjusting the Y coordinate of the Rectangle property, but somehow it throws Validation Errors all the time.

If somebody knows what to do here, I would be really glad.

Best regards,