TPMS sensor but not air pressure

(2017 RAV4) My tire pressure light blinked for 90 seconds then went steady, which I read means a TPMS system issue. I validated all my tires were are spec for tire pressure (each 33 psi cold reading, recommended 33 psi). This was happening for a week but suddenly stopped (no more light on). My dealer appointment is tomorrow. Should I still bring it in for diagnostics or if the light no longer is on, should it be safe to assume was a temporary issue like a loss of signal or something?

I’m nowhere near a car expert, sorry if this is a dumb question.