I am facing the same issue. But it is not at the spawn location. It is inside a cave, some distance away from my spawn location. Unable to place or mine in a region. My friend who has hosted the server is able to mine it though
The error of "Exec format error" is because the bedrock server is not currently compiled for ARM processors.
I've tested this bug, I spawned a wolf in creative changed to survival, I hit the wolf and the angry wolf didn't do damage, I tried in each difficulty and he still doesn't damage the player. This bug is confirmed by me.
NOTE: I tested this bug using a Windows 7 computer.
I am on an iPhone Xs and facing the same issue.
OS Version: iOS 14.3
Minecraft version: v1.16.201