RPI4: Controller keeps disconnecting on lastest Bluez version

[Sebastian Schmiedel]

Hardware: RPi4 B 4GB
Kernel: Linux raspberrypi 4.19.97-v7l+ #1294 SMP Thu Jan 30 13:21:14 GMT 2020 armv7l GNU/Linux
OS-Image: Raspian Buster Lite (20.02.2020)

Package: bluez
Version: bluez/testing,now 5.50-1.2~deb10u1+rpt1 armhf

Hello,
this is my first ever report so i hope this is the correct way:

How to Reproduce:
Try to connect a Switch Pro Controller on latest bluez

Details what happens:
When i update Raspian (lite) to the latest package versions
my Switch Pro Controller isn't connecting correctly anymore.

The steps in bluetoothctl (pair, trust, connect) all seem fine until you connect. The connection seems (at first) to work,
but you will notice that the lights on the Pro Controller get "stucked"
and bluetoothctl will tell you that it's disconnected immediatly after connect. When you push a button on the controller, bluetoothctl recognizes it correctly, connects and keep immediatly disconnecting.

Exception:
Other Controllers (like the Wiimote) seem to work, so it's probablya more specific problem with a special type of controllers?!

Temporary Solution:
When i revert to package-version to "bluez/stable,now 5.50-1.2~deb10u1 armhf" or just stay at the latest version that comes with the image "bluez/testing,now 5.50-1+rpt1 armhf", everything works fine.

Sorry im an absolute newbie on Linux, so i hope this isn't a total dumb report :)