There is a problem with "Gallery" control since the latest PowerApps release (3.19013.14).
Before, in development mode, I was able to select any control in the first line of the gallery, and then modify a property of this selected control. But since the release 3.19013.14, this is no longer possible.
To do what I want to do, I have to insert a new gallery, connect it to a data source and then redo all the work !!!
Based on the version history of my PowerApps application. The release 3.19013.14 was deployed between January 30 and 31, 2019.
I absolutely do not want to wast weeks of work because of a new PowerApps release ! Please correct this as soon as possible.