Copy & Paste inside editor doesn't work on iPadOS 13

When using the monaco editor version of the site, I can use all other keyboard shortcuts except copy & paste. Even if I change them to some other command, they don't seem to work.

I'm using the React + TS client template, if that matters. On an iPad Pro 12.9", with a keyboard attached, running iPadOS 13.1 beta. (Copy & pasting hasn't worked at all for me in any version, except for the "mobile" site that lets you use codemirror, but locks you out of everything else.)

Not sure if it's related, but when I click on the paste option in the edit menu, I get some weird behavior where it shows the default iOS paste tooltip. Clicking that does nothing as well.

I know it's not the monaco editor itself, because I can copy & paste perfectly via their demo:
https://microsoft.github.io/monaco-editor/playground.html

Is there a way to resolve this? It's kind of the last barrier before I can fully start using codesandbox.io.