Thanks for the additional information.
We’ve received another report from someone else that seems like it may be related to your issues.
The other customer has stated that “every 3 seconds or so, my screen will freeze for a fraction of a second. This occurs if im moving my mouse around, and the entire screen will freeze”.
The customer is using two LG 27UK850-W displays, one via HDMI and one via DP. His displays are operating at 60Hz.
We haven’t encountered this kind of behavior ourselves in testing. I will see if I can find any commonality between your model display and his displays that could be related to this behavior.
What bit rate and refresh rate is your display currently running at over DisplayPort through the dock? Looking at your display specifications it supports:
HDMI (Max. Resolution at Hz)
3440 x 1440 10bit at 85Hz
DP (Max. Resolution at Hz)
3440 x 1440 10bit(RGB444) at 144Hz,
3440 x 1440 8bit(RGB444) at 160Hz(O/C),
3440 x 1440 10bit(YUV422) at 160Hz(O/C)
Please note that we do not officially support greater than 60Hz at any resolution. If you try 3440x1440 at 10bit 60Hz over DP, does the lagging still occur?