Connect IQ does not recognize updated IQ apps

As the title say: it is not possible to get installed IQ apps (data fields) updated.

What I found out:

It makes a difference whether or not you have an IQ app installed on your device:
-If an IQ app isn't installed and you search for it in the GC-IQ mobile app, the app (data field) appears in its updated version.
-If the app is installed on the device and you view it among the installed apps, it displays the old version. GC-IQ doesn’t recognize that a new version of the app is available. It cannot be updated.

My workaround: I uninstall GC-IQ from my iPhone and then reinstall it from the App Store. This takes just a minute, and the GC-IQ mobile app works. (But only for this one time.) 

As an alternative, you can also delete the IQ app (data field) from the device and then reinstall it, though that's much more complicated.

(maybe it is only a iOS issue?)