Ordering drum list in editor misbehaving

At first I thought it was because I’d created a map from BFD3 but it’s also doing it on supplied maps too. I’m trying to reorder the drums in the editor list.

At the top of the list everything seems fine: you can swap lines over with no problem whatsoever.

But within a few lines of the top you can see the green highlight starting to obscure the drum name, rather than appear in the gap you’re aiming at, so it’s less obvious where the drum will end up.

By the second page, I’m having to aim one slot too high.

By the bottom, the highlight is out by several lines.

Anyone else having this problem? Is it part of the “gui lag” problems I keep hearing about?

Windows 10 Home 64-bit
Cubase 8.0.35 64-bit

Focusrite Saffire LE (FW400) v.1.6
Dell XPS 8100 Desktop

  • CPU: Intel i7 860 @ 2.80 GHz (HT OFF, C-State OFF, SpeedStep ON, TurboBoost OFF)
  • Chipset: Intel H57
  • RAM: 4 x 2 GB DDR3-1333 MHz
  • HDD: Non-RAID, 2 x 1TB Samsung HD103SJ (7,200 RPM; DTR: 250 MB/sec; Latency: 4.17 ms)
  • Grafix: ATI Radeon HD 5700 Series (8.850.0.0)