Everything is the same as far as I can tell though something must have changed. If I take the same file that was saved days ago and export it, it exports with the distortions, If I bring it back into Blender the distortions are there. It seems certain to me that something in the export procedure has changed.
The model has been QuadRemeshed but so were the all the models from two days ago.
I am not familiar with Subsurf Modifier and I don’t see it on the menu of modifiers. I have not needed to do so in the past. Perhaps this has something to do with the subject of this thread “Instances not evenly distributed” but this tessellation/distortion issue just started last night and I can not think of anything I changed intentionally to cause this. I feel like I accidentally changed a simple setting.
I have created a new thread for this issue
Perhaps we should take up this issue there?