Recently I've upgraded to new version 4.4.2 and now I've faced two major problem:
First:
ol.style.Text now not support RTL text and render it in LTR style! In the previous 4.3.3 version I didn't have any problem with it. (see parentheses in the below image)

And this is correct one with 4.3.3 version:

Second:
When using placement: 'line' in ol.style.Text , it doesn't support RTL as well and text`s letters render splitted!

And this is correct one with 4.3.3 version:

Recently I've upgraded to new version 4.4.2 and now I've faced two major problem:
First:
ol.style.Textnow not support RTL text and render it in LTR style! In the previous 4.3.3 version I didn't have any problem with it. (see parentheses in the below image)And this is correct one with 4.3.3 version:

Second:
When using placement: 'line' in
ol.style.Text, it doesn't support RTL as well and text`s letters render splitted!And this is correct one with 4.3.3 version:
