Caption bubbles cut off

I am having a similar issue, but I'm not sure it's the same solution as mentioned. It's certainly not what Leslie pointed out.

I have created this screen so that when the learner clicks on each caption bubble, they see an explanation of why we ask that question. The revealed layers work fine, but the base layer cuts off all the captions.

I'm using the Modern player, so it's not about scaling. And I have tried with Modern Text turned on and off, and that didn't do anything.

Any ideas?