Example where the user was already shadowbanned before sending the chat invite, and able to have a whole conversation and send images (N.B., scammer sent unsolicited NSFW pic in this):
https://old.reddit.com/chat/channel/1384697_44dbe6baa2e69e24dc1821f9a95e43e6b5d41de0 (I also reported several messages in that conversation; if there's anything else needed for admins to track down what is happening, let me know.)

I am not sure if there are other instances, but I think there are; I recall a couple other times of checking the profile of a user who was chatting with me and finding they are already shadowbanned, though I didn't specifically check if they could still message after that moment.

If this is widespread, this is very concerning because the overwhelming majority of scammers that message my communities' members are only ever shadowbanned, meaning that they are now free to continue scamming users even after they are banned from Reddit. Community bans are already completely useless against these, despite our numerous pleas for community-banned users to be restricted from messaging posters or seeing posts or usernames, but now even site-wide shadowbans have no effect; what is going on here, and can this be fixed?

Is anyone else seeing chats from shadowbanned accounts?