can keep fly when leave the residence (bug)

[aDaGugugu]

players can keep fly when they leave the res which is enable the fly mode.
When players place a chest in the second to last block from the top of the res (with the top of the chest one block below the top of the territory and having one block of the air still within the res) ,and keep jump on it while having jump boost II,they will keep fly even after leaving the res.

Server version ：1.20.6 Spigot