There's a bug in the SurvivalGames plugin where players are able to obtain invincibility after rounds. This fixes that bug while the dev works on implementing. This does not contain any code from the SurvivalGames plugin and must run alongside.

https://www.spigotmc.org/resources/survivalgames.1351/

There's a config option to add a fail safe that will clear a player's invincibility when they teleport to a specified world. (This is only necessary if you still experience issues) Only put worlds in this list that do not contain any SurvivalGames arenas.

If you reload the SurvivalGames plugin using a plugin manager, you must also reload this plugin.