More information on how to read Thermals is provided under "info" icon
@mg There is already a way to display airspaces using Airspaces plugin by @rittels (at least in the desktop version).
Go to Menu --> Install Windy plugin and load it.
@vicb Thanks for reporting that. We've noticed it too and we're looking into what is causing it.
@vicb Sorry, that is something we want to keep to yourselves yet.
We're open to discussion on what should be forecasted under which conditions though.