Twine 2.0 not working properly in iOS?

I'm trying out the online Twine 2.0 interface on my iPad and I'm finding that it doesn't appear to really work' when tapping individual passages, the text box never becomes editable — the on-screen keyboard doesn't appear, and an external one isn't able to type anything in the box. Further, when trying to test it live, the debug and play windows open in a second tab, but they're both completely blank. I haven't really seen this issue on the forum (most posts appear to involve importing or archiving, which seems to work fine for me) so I'm not sure what's up.

I've tried this on both an iPad Pro as well as an iPhone, in both vanilla Safari and Chrome.