Large tables cut off in flowable epub export

I'm exporting a book from InDesign to both PDF and EPUB formats. The EPUB must be flowable, and I'm using Aquile Reader to review the output. Most of the content converts well, but a large table is getting truncated during export.

This table is critical and needs to retain its original structure. Because it's too large to fit within the two-column layout of the book, I anchored it to a section of the text that references it, rather than placing it directly inline. I've tried making the graph smaller, but that somehow made it worse.

I've included screenshots below. What's the best way to ensure the full table exports properly in the flowable EPUB format?