Unfortunately I have to second that; did the update on 2 machines (Ubuntu; "classic" update via git pull origin master, not via repository) but these machines don't show up on the pool anymore...
getinfo says "1.0.8.4" and getmininginfo looks perfectly normal (poolmining true, submitting solutions etc.) but somehow the pool doesn't seem to recognize it.
@Rastislav posted the same issue in Slack, then "stopped the jobs and restarted, now it seems to be working fine."
Tried that multiple times, no luck unfortunately. I'll just leave it be for the night; let's see how it will work tomorrow....
Others posting in Slack ... still having a problem with missing miners, but not showing in "My Missing Miners".