I have used trapdoors as a decorative alternative to fence gates for years, but as soon I updated my world to 1.18 my livestock have been hopping over the trapdoors!

-Will happen regardless if the world is old(pre1.18) or new(1.180

-Mobs can't glitch through trapdoor, but can hop on top of it

-All mob such as horses, cow etc. hop over the trapdoors

-fence gates still function normally

*Have video evidence but it takes to much space to be attached