I was experiencing this issue with one of my clients and only where the thin clients were connected to high res monitors. The workaround suggested in this KB did not work and VMWare support confirmed that the workaround doesn't work consistently. For me the fix was ESXi 6.0 Update 1 and View 6.2
Ugh. So, I have applied this workaround to two users, but the value it says to change to false was not even in their VMX files. I added it, but since the KB does not reference what to do in the case of it not being there, which they would normally do, it makes me less than confident this will work.
The problem with upgrading is I have 5 customers on various versions below Horizon 6.2, so I am going to have to update them all first, then all my hosts, just to fix this issue on their one environment that is only affecting a few users. Good times.
I'll post back once I see if the workaround works for them. Marked correct answer because that KB is definitely my issue, the log matched exactly.