The sequence is ROX where R is you, O is the bubble, and X is any other object. In any direction. Like popping a spot, pressure from both sides.
You can talk to the other RCV to move it around, allowing you to put an object on the other side of a bubble to pop it when pushed. Otherwise the bubble will say scronch. I do believe this area needs a tidy up and a bubble popping enthusiast to learn from.
It's also possible an error occurred, softlocking the bubbles somehow, but I don't have any leads yet on what that could be. I'll keep a look out.