Original texture pack glitched

Phone: Asus Zenfone 3 Max

-When im entering my world, i noticed that all texture pack(excluding mobs, and few items) are glitched , but when using in hand, its fine

-The first 2 screenshots with black+purple coloring is when im entering for the first time

-The second one is when im re-entering my world (the one with very odd textures)

-The third time, its working fine, still, its a very odd glitch

-Probably because:

  -im using Dragon Mount Addon(never happened before)http://mcpedl.com/dragon-mounts-addon/

   -Im leaving my world with night vision effect on