How to fix 'Reveal All Words' not working in Quartiles game on iPhone?

My husband and I have been playing the Quartiles game for a while. There have been random problems all along. The latest is that the Reveal All Words is not working. After reading various suggestions I tired rebooting the app and rebooting my phone. Rebooting my phone worked once and then it went away again. I have been on Expert level everyday and it still doesn’t work.

My husband tried all of the same things and his would not come up at all. We have the exact same phones.

is there any hope for a fix on Apples end? We actually like this game and we are paying for Apple News.

Frustrated….

[Re-Titled by Moderator]

Original Title: Trouble with Quartiles