Finally received a response from Poloniex...
"Thanks for reaching out!
We are currently looking into this issue and we will provide you with an update as soon as we have one. In the meantime, please do not create additional support tickets for the same issue as it slows response time. If you have more information to add about this issue, please respond here.
We appreciate your patience and will be in touch as soon as we have an update for you!
Best,
Poloniex Support Team"
Not really much to get excited about...
It is actually nothing to get excited about. I hold another coin where they failed to reactive the wallet for over a year now, ignoring hundreds of support tickets from customers with the same problem. Every now and then they send out the exact statement that you just posted.
you should reply to them stating that the only maintenance they have to do is to restart their node...