Hanging bluetooth file transfers with Pine Phone

I have not been very successful with file transfers a via bluetooth. The transfer begins but hangs. If I cancel the transfer, both phones recognize the transfer was terminated. Anyone else having the same issue? After multiple attempts, I did manage to get a single file (pictures) transferred. I think it was accomplished because the transfer picked up from the previous hangs until it finally managed to complete successfully.

Edit: Also, is there a recommended QR scanner known to work with the Pine Phone?