Editor starts and runs at high FPS (scene performance bound) in G-Sync Dell Monitor (144Hz max) But drops to around 30FPS or lower when I hover my mouse hovers or passed over any UI in editor that responds to hover events - and stay low. If I switch to desktop, and back to editor, the FPS goes up again, but repeating the steps above, it drops down again.
I have another monitor setup that is a regular 60Hz, when moving the editor to this monitor it reports high frame-rate without any dropping to lower frame-rate issues as described above.
My system is Windows 10, 32 GB ram, Nvidia 1080 graphics card.
The monitor model in question is:
DELL S2716DG 27" Gaming Monitor with WQHD 2560 x 1440 Resolution 144 Hz Refresh Rate and NVIDIA G-Sync 16:9 TN Panel