ESP32 BLE connection problem with multiple devices

[VeloProg]

Hello,

I am using the BLE-function of the ESP32 for connecting with bicylcle locks with GATT-Services.

There are several bikes with BLE locks in the close surrounding of the ESP32. I nowwant to connect with one specific lock with known ID.
This works perfectly fine up to a number of approximately 10 locks in close surrounding. When there are more locks in area, the scan will show the device, but I will not be able to connect to it (Won't get a +BLECONN answer). I would be very thankful for ideas.

Firmware: ESP32 AT V1.0 20171117

Regards,

Florian