Could my Apple Watch series 9 be hacked?

I’ve never had this happen, and it’s made me quite uneasy. Tonight, while wearing my Apple Watch, I felt a bunch of haptic feedback. When I looked at the watch face, it was on the passcode screen and numbers were being typed very quickly, without touching the screen. Almost like someone was trying to hack the watch. I kept trying to turn it off, but couldn’t get to the screen to power off as it was attempting passcodes and ended up calling my husband. Eventually I was able to get to the screen to power off, but it was extremely difficult and ended up sending out an SOS in the meantime. I got the watch to power off, and ended up resetting it and restoring from a backup.

I’ve had Apple Watches before and this has never happened.

[Edited by Moderator]