Poloneix have been an issue ever since I joined Steemit over 4 weeks ago. I cant believe anyone still uses them. There are serious issues there. They have never commented why Steem is disabled so regularly. I originally assumed it was due to HF19 but that's obviously not the case.
I will never use Poloneix again. there are alternatives which work perfectly well so why bother tasking the risk with such a shoddy company.