Steps to reproduce:
Create a world with the seed "7650280998891964417".
Go into spectator mode.
Enter this command:
/execute in minecraft:overworld run tp @s -1620.75 -4.17 1145.55 -194.70 25.80
❌ You can see a stronghold intersect a trial chamber, replacing part of its structure.
So this is a duplicate of MC-266519, which is Won't Fix (that's why I didn't find it initially). Sorry for that.