I'm having issues with the perspective viewport in the latest version of Houdini (21). Please help!

No matter what I do (panning, zooming or dragging camera in perspective viewport) the camera scrambles like crazy. I have to press F or Space + F to focus back on the mesh. Didn't have this problem at all in v20.

UPDATE: According to technical support, the issue is due to my PC not meeting the requirements for Houdini v21

did you try setting the 3D Viewports to OpenGL instead of the fancy new buggy Vulkan in the Prefs ?

I had some similar tumbling issues in H21 and this seems to have fixed it for me.