OBD BLE connector not found, or blocked on step 3

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/obd-ble-connector-not-found-or-blocked-on-step-3/
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Hello,

Configuration:

• Android 10 - Hyundai IONIQ 5 / 2 Android 10 devices tested.

=> vLinker MC +
The ABRP app sometimes try to find the connector, but it failed at step 3 "vehicle connection status". The first 2 steps are checked successfully, but not the third one.
Sometimes with persistence, it works and I can establish the connection, and the data goes into ABRP. It never finds the Android version always the iOS version but sometimes the data works.
But it is very unstable, because in 99% of the cases I am stuck on step 3.

=> vgate iCar Pro BLE
The ABRP application does not find the connector. While in the BT settings of Android, the OS finds the adapter in "Android" version.

Tests:
I tried with the 2 connectors linked to the OS, and with the connectors not linked to the OS.
Sometimes can connect on the OBD if the connection with the OS is not established first.

I checked that no OBD application is installed. I just have ABRP. If I install EVNotify, the application can get all data from the connector.

Damien