I tried "Ĉu estas la viando freŝa?", and I got pinged.
It's fine, but they can't think of every possible valid combination in advance.
Report it if you like.
Is there an easy way to report a given question after it has already come and gone?
I don't think so. You have to wait until you happen to get that question again (e.g. by strengthening the topic containing it and hoping it comes up).
I just got this right now, i will flag it