NRF52840 dongle - not working after short circuit

Hello everyone,

We're using a NRF52840 dongle for a Uni project.

We got a couple of dongles it.
I stupidly used a image on google to know the pinout because it's hard for me to see the pin numbers in the board. Lucky me - it was completely wrong. So I shorted VDD out with GND...
The board now doesn't turn on from USB though it can be powered externally.

Even more weird, if I power the 3.3V for a second it will start working from usb power only.
Is there any way to solve this or do I have to use external regulator from now on?