Android App on ChromeOS - reloads on resize?

I’ve been developing an Android & iOS app for several months now, and it’s been working as expected. When the user rotates their device, the app rotates and resizes things appropriately.

But recently I installed my app on a Chromebook that supports native Android apps, because we expect some users will want a physical keyboard. The app loads and works just like it does on an Android tablet, except for the fact that changing the app from fullscreen to a windowed view reloads the page. My app requires significant data entry from the user, and I don’t want that to be lost if they change how they view the app.

Why is Ionic reloading on resize?

How do I prevent that from happening?