[1] FIXED: Holograms disappearing after player teleportation (RTP) - now properly refresh visibility on world change and teleport events
[2] FIXED: Display entity holograms not respawning when chunks unload - added entity validity checks to detect dead holograms
[3] FIXED: PacketEvents holograms not updating for players after teleport - added automatic visibility refresh
[4] FIXED: FancyHolograms not refreshing for players after world change - added force update mechanism
[5] IMPROVED: Hologram healer task interval reduced from 5 seconds to 2 seconds for faster recovery