Bluetooth keyboard picks up different layout

Hello.

I have an external bluetooth keyboard (logitech) for my iPad Air. I also have installed a secondary keyboard language (Bulgarian) which has 2 layouts (Phonetic and Standard). The layout that I choose to use is Phonetic (which is the second on the list).

When I use my onscreen keyboard the correct layout is showing (Bulgarian Phonetic). But when I use my bluetooth keyboard the language used for writing is (Bulgarian Standard).

What I tried:

1. Re-Install Bulgarian Keyboard
2. Re-Pair Bluetooth Keyboard (+ forget device)
3. Change default layout to from Bulgarian Phonetic to Bulgarian Standard

Action number 3 works ok. It shows the Standard Layout in the onscreen keyboard and the bluetooth keyboard is also using this layout. Unfortunately, this is not my preferred layout and I do not want to use it. This experiment makes me think that the bluetooth keyboard always picks the first layout from the list of keyboards for a selected language.

It is a strange behavior for me because the keyboard was working correctly before couple of months. I guess it was an update which caused this issue.

I will be happy to hear you opinion!