I think it was around the 2018.01 version where there seem to have been a bug when orbiting with the navigation icons, so you canīt rotate/orbit full out it sometimes get to a halt.
I think it was fixed around 2018.02 or 03 version.

I upgraded to 2019 and now this is back again.

Please donīt tell me to use alt rotate, thatīs another discussion of how one would like to work with it.

Any Idea what is causing this, canīt recall that it was some openGL setting or driver issue, but in fact something the Lightwave team fixed.

Note...when rotating with the icons, I can rotate full out, but as soon as I let go and then pick it up again..thatīs when it wonīt be able to do a full orbit but just locks the rotation to a halt.