This is in a single-player world. After trading with a Cartographer and levelling him up to his second level, (the level where the woodland explorer map and ocean explorer map are unlocked) the game 'freezes' for up to 20 minutes. I can't open chests or interact with anything. After a little while, the game catches up and teleports me back to where I first traded with the villager (No time passes in-game.) This only happens when I level this villager up to the second level. I think this glitch has something to do with the explorer maps. Also, my CPU usage goes up to 80%-90% when this happens.