Since 1.13.2 I have encountered this bug on singleplayer game.

Whenever I try to buy an "Empty Map" from a Cartographer the game freezes.

All mobs stop moving and making sounds, the sun stops and I can no longer interact with most blocks (like bed, crafting table and the villagers too).  I can destroy grass tho.

If I close and restart the game, it turns out we never made any trade, as I don't have the map I previously purchased, and all my emaralds are still in inventory. The trade pretty much never happend, or it wasn't saved.

It happens to me only when I try to buy an "empty map"