Annoying line on the right top of messages

[Members_iYXZo3T]

 this annoying thing appears on some messeges. It blocks the delete ico .Does anyone know what is it

[Robin999]

Looks like a volume slider. Have you tried to interact with it! Does it do anything at all?

[keith30]

Your the second one this morning talking about this problem, the first one someone said it happens with his WhatsApp app maybe there's a few more.

[Piper123]

If you slide it to the left, I believe it brings up a shortcuts menu.

[Members_iYXZo3T]

Tahnks all. I slided it to the left and it was the phone transilator. Now how to just switch it off or at least change its location? 

[Sombody3]

Slide it out and press the X symbol. It should go away.