IOS 17.4.1 update issue for Bengali writings

I am part of community if facebook where the writings are in Bengali. After IOS 17.4.1 update all my facebook posts with Bengali writing are distorted from the mid section of any write up. As I start reading any write up, it is good till the half way. After that the writings are distorted and not makes sense. It is happening in my iphone 13 Pro starting after the IOS update. Would appreciate if you can fix it.