usb-C 4k on Dell XPS15 with Win 10 pro random slow downs using DELL 2715Q extended monitor

I recently (Jan 24) purchased a Plugable USB-C 4k. I’m experiencing slow response in the external monitor at times. I’m looking for a solution.

This device interfaces my XPS 15 laptop to my 2715Q external monitor. I have a DP to mDP cable providing the connection. I have recently updated the computer to the latest DELL drivers as well as the latest MS updates:

OS Name Microsoft Windows 10 Pro
Version 10.0.16299 Build 16299
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name MOON5
System Manufacturer Dell Inc.
System Model XPS 15 9550
System Type x64-based PC
System SKU 06E4
Processor Intel® Core™ i7-6700HQ CPU @ 2.60GHz, 2601 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date Dell Inc. 1.6.1, 12/11/2017
SMBIOS Version 2.8
Embedded Controller Version 255.255
BaseBoard Manufacturer Dell Inc.
BaseBoard Model Not Available
BaseBoard Name Base Board
Platform Role Mobile
Secure Boot State Off
PCR7 Configuration Elevation Required to View
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Boot Device Not Available
Locale United States
Hardware Abstraction Layer Version = “10.0.16299.201”
User Name MOON5\Hicks
Time Zone SA Pacific Standard Time
Installed Physical Memory (RAM) 32.0 GB
Total Physical Memory 31.8 GB
Available Physical Memory 24.7 GB
Total Virtual Memory 36.6 GB
Available Virtual Memory 28.5 GB
Page File Space 4.75 GB
Page File C:\pagefile.sys
Virtualization-based security Not enabled
Device Encryption Support Elevation Required to View
Hyper-V - VM Monitor Mode Extensions Yes
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware Yes
Hyper-V - Data Execution Protection Yes