Viewport jumps to random position

#1

Hi Elco

I have a strange issue, and it’s not consistent.

Most of the time when I’m placing lattice support contact points on the model, things go just fine. However sometimes, it will not place the contact ball, and the viewport will jump to some random position, sometimes so far away that the build plate is no longer visible in the viewport. I can not find any consistent condition for it (i.e. surface angle or whatever), apart from when it happens at a certain point, it always happens at that same point.

#2

@formware Here’s a screengrab showing it happening.

Recording 2025-10-26 234331.zip (8.9 MB)

#3

@formware, I’ve gone back to 1.2.6.1 and can confirm that it doesn’t exhibit this behaviour, so it’s confined to 1.2.7.3

Update: And… I’m forced to go back to 1.2.7.3 as 1.2.6.1 won’t open any fw3d files created in 1.2.7.3. This is a big problem for me.