We want address the search market for USA and UK. Therefore all english pages have small regional variations with similar content.
Since a longer time (after a relaunch) Google has problems to identify the right page (/en-gb/) for the right search market (UK) - although we use hreflang and sitemaps from the beginning.
We monitor those in moz for our UK campaign (/en-gb/ pages) by jumps in the ranking of individual keywords (>-50 and >+50).
-50 means not that the ranking of our website is lost. In this case Google will substitute the ranking of the /en-gb/ page with the variant /en/.
One excample:
https://www.openmind-tech.com/en-gb/industries/cam-software-for-motor-sports/
This page lost the ranking and the other languag variant is ranking for position 2.
https://www.openmind-tech.com/en/industries/cam-software-for-motorsport/
In the moment I have no idea what we can change in our html code.