Sometimes when I try to focus on some selected geo, like some polygons, points of edges, on a transformed object the focus is way off.

Houdini focuses on some strange coordinates, sometimes just empty space in the scene.

Has anyone else noticed this and maybe knows the cause ? Because this is extremely annoying and makes modeling in Houdini even more frustrating then it already is.

.... this seems related to the long standing bug of Houdini ignoring object transformations when "Hide Other Objects" is selected. At first it seemed it didn't matter if "Hide Other Objects" is off or on, but its the same issue.

Sorry.

Isn't this caused by your camera's clipping plane not auto-adjusting? In your viewport display options/camera. From your view of the origin, the focus doesn't seem way off.

Nope, I wish.

It's related to Houdini ignoring the transforms at Object level when you activate " Hide Other Objects", but when focusing it sometimes seems to focus on the transformed geometry while the un-transformed geo is visible.

Sometimes the transformed object completely disappears from view when hiding other objects, you don't even have to focus on anything, just selecting "Hide Other Objects" is enough.

The focusing part is hard to replicate because it's a glitch that doesn't happen all the time, but you can see the object moving to the center in quad view when toggling "Hide Other Objects" and Ghosting or Showing them.

I submitted this bug a long time ago, but so far no cigar...

Yes, support confirmed its a bug (Bug 144772).