Mouse lags on MBP 16" via TB3 Dock

[Perezx]

Hello guys!
I have to ask for your help.
I use MBP 16" 2019 (Intel) with couple TB3 docks: Mokin 13-in-1 (DP + Ethernet + USB3 + USB2 and couple other ports I do not need) and j5create JCD 389 modular dock.
In both cases I have MBP closed, so LG Ultrafine 5k (3440x1440 @ 60 Hz actual resolution) is the only display.
Apple wireless keyboard is fine, but Logitech MX1100 mouse, while its dongle is connected to USB 2.0 on dock, appears to be a bit unpredictable - just like sometimes computer loses connection to it. If I also plug in external USB 3.0 HDD, mouse gets unusable - it loses movements, clicks etc.
If mouse dongle is plugged into TB3 port everything is fine. However, It is a bad choice for me as I often have to go somewhere and take MBP away, so unplugging just dock is a much greated idea.
Did anyone had similar issues - laggy / uncontrollable mouse plugged into dock ?
Thanks in advance!

 

[Bigwaff]

These aren't TB3 docks. They are USB3 docks.

Wireless product not working properly when also using a USB 3.0 device

When using a USB 2.0 2.4GHz wireless peripheral device (such as a mouse, keyboard, or headphones) with a PC that also has a USB 3.0 peripheral device plugged in, you may experience erratic operatio...

support.logi.com

 

[FreakinEurekan]

USB 3.0 can certainly cause interference with Bluetooth. One option that SOMETIMES helps, is get a USB extension cable (a short one, a foot or two) that moves the Bluetooth transceiver away from the dock and more toward the mouse.

 

[Perezx]

These aren't TB3 docks. They are USB3 docks.

Is USB3 capable of running 4K@60Hz ?!
Thanks for your link, seems to be the clue!

USB 3.0 can certainly cause interference with Bluetooth. One option that SOMETIMES helps, is get a USB extension cable (a short one, a foot or two) that moves the Bluetooth transceiver away from the dock and more toward the mouse.

Okay, I am now trying with dongle attached by 20 cm USB 2.0 extender.
In both cases mouse and dongle are within 1m range.

 

[Perezx]

Despite it's not aesthetically flawless, this solution (attaching dongle via USB2.0 cable) seems to work fine. At least I cant see any inconsistency in mouse movement while performing Time Machine backup...
Thanks a lot, guys!