Dell Thunderbolt Dock

I recently purchased a Dell Thunderbolt dock for my Precision 3520. I hooked up my Logitech universal receiver to the Thunderbolt dock. The mouse and keyboard have significant lags (the keyboard repeats itself periodically). As soon as I move the receiver back to the laptop, the lags disappear. The problem is so bad that the mouse and keyboard are basically unusable when plugged into the Thunderbolt dock.

Has anyone else experienced this issue with either a Dell or other brand Thunderbolt dock? Have you been able to resolve it?

I was hoping to have just a single cable to plug up that would charge the laptop, provide video interface to my monitor (HDMI, 1920x1080), connect to my ethernet via CAT6, and connect to the Logitech universal receiver so I can have a wireless keyboard/mouse. It defeats the purpose of plugging up the receiver USB dongle every time I "dock" the computer. If that were the case, I would just leave it on wifi and hook up the HDMI directly to the laptop.

All drivers are up to date.

Perhaps I should get a dock that isn't Thunderbolt since I don't have a 4K display. Not sure if one of the cheaper docks would work (charge laptop, use Logitech's receiver, etc.).

Update: Received the WD15 dock yesterday (USB-C, but no Thunderbolt). Works like a charm with the Logitech receiver plugged into the dock. Now I can plug a single cable into the laptop for everything to work (ethernet, monitor via HDMI, dictation microphone, Logitech receiver, etc.). Will be sending the Thunderbolt dock back to Dell for a refund.

I also experienced this issue, but was finally able to resolve it.
As per the in-box requirements, I upgraded the laptop's BIOS, as well as the Thunderbolt docking driver before attaching the docking station.
At this point, after attaching the docking station for the first time, I experienced the lagging issue.

The BIOS version I installed was 1.5.2, issued in July 2017.

Later, in early August 2017, I was looking for an upgraded BIOS, to see if that could be the cause of the problem. I then discovered that the 1.5.2 version had been pulled off the Dell support pages, leaving only the previous 1.4.3 version (from May 2017).

Even later in August 2017, a new BIOS version was finally released - the 1.5.3 version at 23rd August.
This BIOS version resolved the issue.

So it seems that Dell BIOS developers are humans as well ;-)

Thanks @mgroetan. I ended up sending it back for a refund and got a WD15 dock.

@bro67 The WD15 has worked well since I got it. :)