Tiiiny mite like bugs in smoke detector

Had a false alarm this morning (after waking up, thankfully).

Charlotte, NC, USA metro.

Took a look inside, and there were a decent amount of spider webs and 1-2 of these small bugs crawling around inside.

EDIT: This detector is hardwired, and installed in the upper floor ceiling - blown insulation and hot, humid attic space above the box.

Super tiny!! Probably 0.3mm or smaller in length if I had to guess.

Large abdomen vs rest of body.

Pretty fast for its size.

Tan color (although my wife described it as reddish.