Since some time I can only chat when playing from a PC, but no longer from my cell phone. I apologies to everyone talking to me during games for not answering.

Is there a way to see the chat on the mobile?

On an android 6 tablet using Google Chrome
Top right click 3 dots and select “Desktop site” and then play games with chat
Or
Top right click 3 dots and select “Settings”
then select “site settings”
then turn on last setting “Desktop site”

Or use the app

If you have a low memory phone only use apps if the browser can't do it