Slime not spawning

No matter the time. No matter the difficulty. Full moon…. Below =y39 in caves… I’ve done it all. I’ve always had slime to spawn in swamps for me but not even in a mangrove swamp are they spawning in the world for me. Never had this problem. Even tried creating a new world. Still no slimes spawn in my world. Please fix this bug. As I and any other players with the same problem need slimes. Thank you.