The bug
/place command sometimes doesn't check whether the position is reasonable, thus sometimes crashes game.
How to reproduce:
create a new default world (not a super-flat world)
then
run
/execute positioned 1000000 1000000 1000000 run place feature minecraft:acacia
✔ returns That position is not loaded
run
/execute positioned 1000000 1000000 1000000 run place template minecraft:ancient_city/city_center/walls/left
✔ returns That position is not loaded
run
/execute positioned 40000000 0 0 run place structure minecraft:mansion
(must be mansion and out of world)❌ Throws an unhandled error
run
/execute positioned 1000000 1000000 1000000 run place jigsaw minecraft:ancient_city/walls minecraft:connect_wall 1
❌ Return successful message
run
/execute positioned 40000000 0 0 run place jigsaw minecraft:ancient_city/walls minecraft:connect_wall 1
❌ Game Crashes
Can reproduce, the game does indeed crash.