Ok, i tested it yesterday.
I'm using: oneplus 5t phone, modified mi fit 3.4.6.8, GB 0.30.0. Resources V40 from kirill. Didn't change the settings at the testing time (except rtl)
- With MagicalUnicorn's English Firmware 1.6.0.16 | Fine Font - even if i enabled the rtl option there's no problem.
- With kirill's English Firmware 1.5.0.2 (DD/MM) - without the rtl enabled there's no problem.
When the rtl option is enabled the BT lost connection.