Why won't my brake lights turn off?

After a long trip aprox. 1100km I turned off my car and didn't touch it for a day, next evening as I was passing by I saw that my brake lights are on, like someone is pressing the brake, I checked that the pedal is maybe stuck or the switch is on but everything was as it should be. I disconnected the battery and left it to sit for a day.

Next day I connected the battery and everything was normal, I drove for maybe 150km and at the end of the drive everything was normal, next morning I checked again and they were again on.

Did anyone have the same problem or know how to fix this?