Issue is intermittent, I've created mqtt-tiles dashboard, when I switch variable value, few times it is reflected and most of the times, it don't, as you can see in attached screenshot, multi-text field is still pointing to '2' while i've changed it to '3' from top left corner.
and if I go and edit topic, without doing any change, and press update, it starts picking up correct variable value.
Thanks for the bug report. We will fix it.