I don't understand this entirely, so i'm going to rely heavily on what I got as a response when I showed this to the discord channel.
Earlier today I noticed a blinking power light on a concrete path, indicating the path wanted electricity. I took a screenshot and showed it to discord. This was the conversation.
1) Try to deconstruct the area with a deconstruction planner
1a) Didn't work, the planner didn't see any entity there.
2) Try to build something else on the area
2a) Build succeeded, the area is not "occupied", I now have two blinking lighting bolts
3) Put a pole in the area, click on the pole, and see if it's powering anything
3a) DING! It's an invisible lighted substation 3 that's "blinking/needing power"
This lead to the comment
"My guess is another mod makes an entity out of two other entities, one of those being a substation/EEI, and the mod author didn’t link them properly"
Hopefully that makes sense, and leads to a bug fix. Really it's just a cosmetic bug, but I can see how it would become a bigger issue if they piled up.