How to prevent the webview from showing unrendered DOM in between page loads?

[myarcana]

iOS WKWebView shows flashes between full-page navigations. I guess it unloads the previous page's DOM, shows the background of the web view, then renders the new page.

Safari (unfairly) does not have this issue.

Here's an MRE project:

https://github.com/myarcana/flash-of-dom-capacitor-issue

Does anyone know how I can prevent this flash in between navigations?