Variables not displaying correctly

Thanks for your help,

I won't be able to try a downgrade until next week and may actually need IT to do it, so maybe we can save that step for last.

This is happening to multiple variables within the same slide. Although, all those variables are being passed to the same display variable for reuse. I've also noticed that it's sometimes rendering memories of the prior variable simultaneous to the current variable, making it look rather mashed up. I've confirmed there's only one text box displaying the content though.

I have launched my learning file where I created the template for this as a practice exercise and it's having the same issue.

If I shorten the variable so it fits on one line, then it displays correctly. But if I keep that same short variable and make the box smaller so it's forced to wrap, then it's blanking on every other line, just like the longer ones.

I'll attach the practice file here.

FYI, this is not the only glitch I've experienced since the upgrade, (invisible graphics in the WYSIWYG, timeline affecting wrong objects), it's just the only one that's making my project unusable.