Alumn and local parent here. Statistically I would love to say it is a safety and it probably is BUT you are correct. I know several solid/high stats kids were were shockingly waitlisted and a very high stats kid who did not receive direct admit to engineering (yet got into Notre Dame and waitlisted at Harvard among others). It seemed to hit the east side hard in particular (not sure where you are but the regional differences were interesting as I didn’t see the same thing at our local HS which is not on the east side, Naviance if you have it, will help you gauge where you stand,
Check to see if either major is impacted, I suspect both are but if not that will up the odds.
Either way, find another safety to add. Not only does UW not offer EA they notify very late so you’ll want something in your back pocket to be safe.