Hi Annabelle,
I am seeing the same behaviour as you describe, to varying degrees of severity. So I am wondering if you managed to solve this problem and find a cause.
I am also curious in which version of Pro you experienced this, and if it was solved in a newer version. We are currently using 2.6.7. Add ing to that, I have this problem in a virtualized environment only. Are or were you working in a virtualized environment too?
It would be nice to hear from you.
Joris Frenkel, Staatsbosbeheer, the Netherlands