Thanks for the question. I was off a little. Its actually 7:30 PM. The ASX have 3 offices in Aus. I think, allowing for Perth being 2 hours behind Sydney & Melbourne, the ASX can release announcements up until 5:30. Perth is currently 3 hours behind in Daylight Savings time. I saw the last announcement came out at 8:28PM, this evening. The ASX release them in whatever order they process them, or receive them, I would say.
As you said...it didn't appear...no surprise there.