App install through Garmin Connect and ConnectIQ not working

Hi, I want to re-open this issue (link to old discussion here: https://forums.garmin.com/developer/connect-iq/i/bug-reports/app-unable-to-install-via-gcm-installs-fine-via-garmin-express)

The only way to install apps reliable is through Garmin Express on a computer. I get tons of support messages (and poor app ratings) from users that are unable to install my apps through Garmin Connect Mobile or Garnin connectIQ. I can easily reproduce the problem myself. It happens for users both on iOS and Android and the problem is that they either get stuck in "install queue" (app never installs) or get reverted back to the app download page, without the app being installed at all. 

Also, there seems to be many issues with app upgrades. Many users have complained that they cannot update apps but have to remove and re-install the app to get the new version.

This issue needs to be prioritised as it impacts the usability of the whole connectIQ ecosystem. We are without a functioning app distribution system