At first, I thought maybe small screen (low resolution) because the typing field looks rather tall. Got information about your phone's screen resolution, it's 1080x1920 from your screenshot. Clearly, it's not forming nicely in that resolution! How does it look in landscape?

Someone, please report this issue about Android app.

Have you tried the web on your phone? I suggest go straight to chat (like chat.yoursite.com) rather than within UNA (yoursite.com/page/chat-plus). Wonder if it forms nicely?

That is my mobile phone screenshot, the landscape look about the same. I've cleared all the apps cache on my phone too.

When connecting, entering https causes an error. You cannot just enter (chat.*.*) has to have http entered first.