Usually a reader and never a poster, but I have a question !

A few weeks ago I took my 2016 Jeep Wrangler to the river and got stuck in mud.

I was able to get out, but now I am having the Brake light pop up on my dash. I have gone underneath and totally cleaned off all the mud, put the light still comes on intermittently, and at odd times !

Driver down the road it pops on for a few seconds and turns off.
At a stop light.
Going 75 on the highway.

There are no codes popping up on my OBDII scanner either

Has anyone ever had this issue ?