I am not using RTL

I found that is not working on old androids and old chrome browsers

On Android 5.1 after updating chrome is working fine. On Android 4 don't working after updates

I found that primus.js don't work on older chrome and Android 

Before to make updates I try messenger 9.0 to 9.5. it's working fine on old chrome and android

I try UC Browser and Puffin browser too. Messenger don't working even on last version