The Bulwark wallet was put into maintenance on Cryptopia at our request. We will request them to bring it out of maintenance once everything is verified to be on the right chain and everything is good. It's not worth the risk to open it up prior to knowing for certain.
Please just be patient, we're all working on resolving this. It's looking like a mandatory wallet update is our end goal to nip this problem in the bud so we're working on doing so.
Is it ok to create a new receiving address in the current version of the wallet?
Check the current block height
https://altmix.org/coins/10-Bulwark/explorercompare it to your block on the wallet. bottom right hover over or getblockchaininfo in console. and confirm you are on the correct chain. then you should be fine.