I am using the lastest version of Adobe InDesign 18.5

Try to create a button including a more than one text box. Nothing overlaps. The text boxes have text wrapping applied. Group the elements and create button.

Create a "rollover" appearance state.

The text will disappear as if something is causing it to wrap and there is not room for the text even though there is nothing for the text to wrap around.

The text should not disappear when creating buttons using text boxes that include a text wrap.