3dsmax 2017 - In only one viewport my edges disappear when I view vertices

[NigelStutt]

This is very strange that when I have my right viewport selected and I then change to edit vertices mode all my edges disappear except for one or two. Yet when I selext the left viewport instead its all fine, as are all my other viewports?

 

Anyone come across this before know what it is? I assumed it was a sort of degradation but none of those settings have any affect. Obviously I can work in my left viewport but cant understand how only one viewport could be glitched like this??

[Yuli Laz]

Hi Nigel,

I had similar issue with the Viewport but in 2018 version. After I installed the latest service pack for this version the issue disappeared.