BUG: CIQ datafields disappear from activity

I have to say that I am very disappointed with Garmin and the fr965. I've had fr245 then fenix6 before this, and the following bug existed more than 2 years ago on those devices and it's still here on fr965, just that this time it's even worse:

I have 12 datafields installed on the device according to Connect IQ android app. However when I edit my Walk activity and want to add a CIQ activity I only see 2 of the 12. I added one of them, saved it, exited the Walk activity, then entered it again, and the one I just saved is gone. Furthermore one of the 2 (out of the 12) I saw previously now disappeared and was replaced by another one. 

I really can't understand how come this is still not fixed?! Even if there wasn't any developer in Garmin who knew how to write a line of code when I first reported this 2 years ago they could've finished at least a BSc since and learn how to code... This is just so ridiculous!