I accidentally killed him with a diamond sword (he disappeared like you would expect), so I went to go look for some more rabbits to tame. When I came home, I found Charles hopping about like normal.
He wouldn't TP to me, I couldn't attach a lead to him, I couldn't harm him at all: not even with lava, I couldn't feed him or rename him either.
I went back to the title screen and came back, he was gone. R.I.P
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.