Oh, I see. I tried to find it in wiki before reporting but somehow missed it.
It still feels wrong and unfair, tho. I did nothing wrong and the game punishes me for it. Why?
The purpose of Iron Golems is to protect villages/players from hostile mobs. However, this very process will eventually cause unlimited destruction of terrain and/or structures if player is just AFK somewhere and golems are left to their own devices, dying and respawning endlessly.
It may sound rare, but it happened for me twice or thrice since Nether Update release, and I don't play that much.
Just to be clear – I'm not asking to remove this feature.
But maybe tweak it somehow, I dunno. E.g. if player is so far that they cannot even hear explosion/evaluate damage/repair/revert to backup, disable this behaviour of creeper. Limit to radius of 20-40 blocks, maybe? So player can safely AFK in big enough base.
Wildfires were "working as intended" as well, but they still were nerfed to become manageable.