i play on seed 0, and found a woodland mansion by accident, before even finding a decent cave.
that mansion can be found at 2700/7050 (this mansion is pretty insane tbh), i found the storage room (which is empty as usual), but for some reason chests were split, even though those used to be connected

a fun thing is there are another 3 storage rooms literally a few blocks away, and those actually have connected chests

i guess it might be related to X-Z axis