Pogo has released a statement regarding the Merge Academy bubbles issue:
The issue causing a bubble effect to remain on screen for some players has been resolved. Thank you for your patience while our team investigated and addressed the problem. If you continue to experience this issue, please restart your game and contact support if the problem persists.
Players should no longer see the bubble effect during gameplay.
This Merge Academy Bubbles Issue was first reported on June 11th and is now fully resolved.