Last week, I tried to suggest an edit for a question on a Stack Exchange site on which I did not have an account. I say "tried," because the button for "improve this question" was missing. I reported the issue on that site's meta, but I don't see that anything happened.
Today, it happened again. And now I have pictures:
For comparison, this is what you're supposed to see.
However, not every question on History is affected:
I'm using Chrome 56 and Windows 10 (no available updates for either). The issue persisted when I opened the page in incognito mode, and also when I opened it in Firefox.
This is only the second time I've noticed it, but this bug seems to like beta sites.
PS Will someone with a History account and sufficient rep please fix the their/there error in the first sentence of the last paragraph? Thanks.