After software update contact is lost between Inspire 3 and my Android phone

[PeterJG]

Today, I was prompted by the Fitbit-app to do an update. Not only my phone but also my Inspire 3 was updated. Now, it appears that the two devices do not communicate with each other any more. I did several restarts of my telephone to no avail. Help !

[PeterJG]

App-info shows 4.43.1.fitbit-mobile-........-...... (updated May 29)
(I'm not allowed to post the complete version-number as I'm getting this kind of complaint:
The message body contains xx-xxxxxxxx, which is not permitted in this community. Please remove this content before sending your post.)

[PeterJG]

when trying to synchronize an red exclamation mark appears like this screenshot ...
the former Firmware version is shown (instead of the new version)

[PeterJG]

I had to re-pair the Bluetooth-connection to get in sync again.
Before, I had also tried a restart of the Inspire 3 to no avail.

case closed ... thanks for your attention