Samsung and LG devices made a change recently with default applications. The default application for Instagram may be selected as "Instagram Story" causing you to go into the story posting process each time you tap the "launch Instagram" button. 

Resetting the default settings under Instagram should help clear the default so you'll be asked if you want to choose between "Instagram" or "Instagram Story" when completing the posting process in Ripl.You can adjust your settings to remember your choice of Instagram or have it so you can be asked each time how you want to perform the action. 

To reset the default settings for Instagram go to your Settings app > Apps > Application Manager > Instagram > Set as Default > Clear Defaults.