Does not automatically translates the language

Hi colleagues,   I recently upgraded an app from 9.6 to 9.15 and it seems the language change does not automatically work (English to German and German to English) when upgraded.  It takes more refreshes and more clicks before it works.     Thanks!          
1 answers

The translation feature in your app is a custom implementation.

The issue you raise is related to the logic in the app. Probably retrieve of data and client interaction is affected by the upgrade.