We are now running release nb137 of MIT App Inventor 2. Below is a summary of the changes since the last release. In the next few days we will update the release notes with more details.

The current Companion, version 2.20ai2zx1 or 2.21ai2zx1, is usable with this release, but you may experience problems. Please update to the latest version, 2.22ai2zx1 as soon as possible. It will be uploaded to the Play Store shortly after this release is live. If you have auto-update enabled, you will get the new version automatically. If you “side-load” the Companion (i.e., not from Google Play), you can use the links/QR Code in the “Companion Info” selection of the “Help” menu).