HauntedSpecter

Bit random but has anyone ever had lights like this appear somewhere totally mundane, like not over a lake or anything, just kind of hovering near a housing estate or whatever?

Skip it. Go to Pendle Hill instead - better views, better history, less chance of getting told off by a farmer.

residual energy might linger in the location itselfThat's an interesting theory but there's zero evidence that energy (of any kind) persists in locations absent a physical structure.

The Rendlesham documents are public and they're fascinating precisely because they don't explain anything conclusively. Condign Report is interesting too but heavily redacted.

I visited the site about five years ago. It's just empty fields now where the rectory was. You can walk around and there are some old foundations, but there's no obvious "haunted" feeling.

I had almost exactly this experience on the A303 near Stonehenge in 2019. Twenty minutes missing, no memory, arrived at destination with perfect time elapsed. Never found an explanation.