Bluetooth dropouts with TDA

Hey guys

i just updated to win 10 1903, intel BT controller with 1903 compatible drivers

all other bt devices work well, but the neo 2t loses every once in a while the connection. I get an error message in the app which says „verbindung zu neo 2t verloren“

sometimes after 20 sec, mostly after about a minute, once after 25min. Very frustrating.

the garmin hr sensor (also connected via bt) stays connected...

reboot helped one time, but only this particular one time

the problem was the same with none win10 1903 compatible bt drivers. 
i updatet the fw of the neo, problem was still there

any ideas?