I have a XPS 13 9300 and I just can not get it to work well with external monitors, mouse and keyboard.

I have tried the following Thunderbolt Docks: Caldigit TS3 Plus, OWC Thunderbolt 3 Dock, Dell WD19TB and Lenovo Thunderbolt 3 Dock gen. 2.

I have tried both using Windows 10 and Ubuntu 20.04 and both show similar issues.

I am running BIOS version 10.0.7, since 10.0.11 made the problems worse and have to reconnect my keyboard several times to get it to work.

My screens are two Dell U2515H and one Dell U2518D.

Everything works perfectly fine on my older XPS 13 9370 (except charging via OWC dock)

The problems are slightly different:

Caldigit TS3 Plus:
Connecting 2 screens through built in DP using MST and one through DP dongle on TB3 port.
Screens randomly (every 1-10 minutes) turning black for a couple seconds, sometimes coming back, sometimes falling asleep and i have to reconnect them to make them come back.

OWC Thunderbolt 3 Dock:
Connecting 2 screens through built in DP using MST and one through DP dongle on TB3 port.
Screens randomly (every 1-10 minutes) turning black for a couple seconds but always coming back online by themselves without reconnecting.
Laptop not charging via dock.

Dell WD19TB:
Connecting 2 screens through built in DP using MST and one through DP dongle on TB3 port.
Screens randomly (every 1-10 minutes) turning black for a couple seconds, sometimes coming back, sometimes falling asleep and i have to reconnect them to make them come back. The dock also has a terrible fan noise that is louder than both the laptop and my stationary computer so don't want to use this one.

Lenovo Thunderbolt 3 Dock gen. 2:
Connecting 1 screen per integrated DP (2 screens in total) and 1 via TB3 port DP dongle.
Screens randomly (usually within less than 1 minute) turning black and falling asleep. Have to reconnect to get them back.

In all these cases the screens are still "active" in the OS, i.e., the screens shows up in the display configuration and i can move my mouse to the black screens.

Has anyone had similar issues or success connecting to a TB3 dock? This almost makes the computer unusable and is very frustrating.