When the chat disappears, it's hard to tell if the message got deleted because you got blocked or the profile got banned or something else.

It would be useful to blur the main profile picture, lock all the other pics, prevent the other person from accessing your profile on Grindr and any of your albums. However, the chat should be retained for a certain period of time so that you can report to Grindr support if there are issues (like assault or abuse) before it gets deleted. You should be warned that the chat will disappear because you were blocked or the account you interacted with has been deleted/removed.