There is a Beta release of the AP Firmware to 1.0.9. It reports fixing connectivity issues. You could always join the Beta Group and then Select the devices you would like the Beta FW for from within the app and the Test it, if you would like.
Here is the link to become a Beta Tester: Become a Beta Tester – Wyze Labs, Inc.
Note, this will include the App as well. Seeing you are on Test Flight, it is actually easier to get the app or not. You install the Beta Apps from Test Flight and the Prod app from the Apple Store.
Here is a link to the Beta Firmware Announcement for the AP and T-Stat: