Hey there, the crossplay message is misleading, what happened is that your name got reported, reviewed by Bungie and deemed to be against code of conduct, and then reset to a Guardian default. A bad name is only 'good' for as long as it takes it to be reported, so length of time is not important. Were you able to type in a new name? That means you did have a name change available. If you were typing a name in, and it was not being accepted, that meant the new name was being rejected by the filter.