Text doesn't always animate in

I hoping someone might know what's going on with this, cause this keeps happening to slides randomly, especially when we update the powerpoint.

Everything in our powerpoints has a fly in animation set to with previous or after previous, but we will have text on random slides, just not show up when exported for html  setting.

We'll have some slides where half the text will show, and the other half won't. We've tried multiple things to get this to work properly, but what might work for one slide doesn't seem to always work for the other slides.  We tried resetting the animations, breaking all bullets n paragraphs into separate objects, duplicating layers and deleting the old ones.

The first time this happened, we thought we resolved it, but when we did a few text edits in the file, 12 out of 16 slides had text missing in export. All that was changed was two lines of text.

We have images with the same animation on almost every page too, but it seems to only be the text that's affected