This isn't a reproducable bug in that it seems to happen at random. I have been dealing with it for several months now.
Here's an example of an asset that says it's belonging to currentxchng but it is really owned by klmay.wam
https://wax.simplemarket.io/account/available-assets/asset/100000019082340?locale=en
I've been told this is a sync issue but I'm not sure that explains it very well. I hope this can be resolved. It is in the API that is returning bad data.