OK, just learning about this, if you have actually mixed your coins before the maintainance commenced, I believe you should receive your bitcoins immediately the time you set is reached, this should have nothing to do with maintainance except for those are wanting to mix afresh.
It seems like they started the maintenance process while the timer for the mixing was still on - so mine got caught up in the process.
Did you take note of the actual time you set to receive your coins? Have the time elapsed and you still haven't received?
Yes I did. It was a 2 hour duration and when the timer ended it changed from “Done” to “Awaiting CoinJoin” and later “Maintenance” and then back to “Awaiting CoinJoin” before I finally went offline.
Although they had a note concerning the awaiting Coinjoin so users won’t panic when it happens.
Copied from unijoin.io
Awaiting CoinJoin: If the CoinJoin has not been completed after the waiting period, your payout may be delayed further. This can be due to the high utilisation of the blockchain, changing transaction fees or unfilled CoinJoin rounds. You will receive your payout to your specified addresses as soon as the CoinJoins are completed. In general, it is recommended to set a higher waiting period for transactions with higher volumes. The additional waiting time is usually a few minutes up to a few hours.
By the way, I have finally received my mixed coin, it came three hours ago. I can now proceed with my review.