Hello @Clem182,
does this mean that you have purchased a premium refurbished deGoogled /e/ phone with “stable” firmware instead of “dev” (pie)?
In intensive testing I have found that the Bluetooth connection between my S8 " dreamlte" and S8+ dream2lte with stockROM Android 9.0 as well as other phones with stockROM Android 8.x and 6.x works lightning fast.
A connection between e-0.8-p-2020-dreamlte and e-0.8-p-2020-dream2lte takes an eternity or does not work. I cannot offer solutions or advice at the moment.