Starting problems with bluetooth and app

Hello,
I am now the owner of a Tympan Rev F and have already been able to try out a few examples.

Among other things, I tried Tympan_Test_BLE, Tympan_Test_BLE_nRF52 and BasicGain_wApp to connect to the app.
Each time I was able to connect the device to my cell phone (Samsung Galaxy S8) as a peripheral, but when I scanned it through the app it wasn’t recognized.

I read all the posts and followed the tips, like restarting the phone, but nothing helped.
But there were only older posts for Rev E found.

Did no one have similar difficulties with Rev F?
What is it failing?