well with the buttons not being next to each other i would take the panel apart and look for water damage to the board that might link the buttons together electrically
Checked buttons couldn’t see any physical marks or damage to the board, I was presuming a board fault but not 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure.
thanks for your time