Panning images broken in recent versions

Latest nightly and beta versions of Brave desktop are broken now on many sites that use a mouse-press for panning images. I have verified that older versions of Brave are fine, and the problem, of course, doesn’t exist at all on other browsers.

I’m running (broken) 1.34.49. A developer helping me installed 1.32.13 and says that version works fine.

Sites so far that are broken are radar.weather.gov, and on ancestry.com if one uses the ‘+’ to expand one of their image assets it is stuck you then can’t move around in the image. Google maps the function works fine.

I’ve cleared my cache and settings, and installed several recent versions. All are broken.