Good to know!
I honestly completely forgot that mod was installed, so that one is on me.
Thanks for figuring it out though.

Sorry for the delayed response.
It should have occurred to me that mods could play a factor, but that's learning.

When placing landfill around an existing offshore pump, if the character is running into the location of the pump, they instantly die.
Factorio_2022.07.24-12.31.mp4

I have been able to replicate it a few times, and it specifically requires me to be moving into the object's location as the ...