This is a night mode bug (...how could white-on-white possibly be an intentional design choice lol)

We will look into this. In the meantime clicking the night mode icon twice should work as a workaround to fix it yourself :)

What happens if you click the night mode button again (to turn it back off?)

This seems to be fixed - unless I'm looking in the wrong place?

Can you guys confirm?

This was fixed a while ago.