Text variables consistently break export to fixed epub, resulting in crash.
When there are multiple text variables (say in a running foot, or TOC) the export to fixed epub causes InDesign to crash. When the variables are resolved to actual text, the export works fine. I tried this in InDesign 14.0.2 and also in the Beta Build (18.104.22.1687) with the same (crash) result.
Kate Basart shared this idea