@p Doesn't Work in Data Tag

@p, @a, @r don't work with data tags.

Tested while trying to spawn a tamed wolf, by using command
/summon Wolf ~ ~1 ~

{Owner:@p}

The command runs successfully, but it spawns a wolf that appears tamed but is just sitting down. It cannot be made to get up and follow you. Same thing happens in command block and in chat.

I found MC-30077, but it was marked as a duplicate of MC-30914, which was marked Invalid.

Thanks for seeing this.