Flashing / Stuttering / Glitching - SpectatorGenerateChunks Gamerule

Setting "Spectator Generate Chunks" Gamerule to 'False' and going to the edge of current generated chunks causing glitches / flashes / parts of chunks disappearing / other graphic glitches.

How to reproduce:

• Set Gamerule 'Spectator Generate Chunks' to 'False'
• Go to the edge of current generated chunks / terrain and look around

• There will be some graphical glitches / bugs / flashing textures of the terrain when moving camera around (Mouse) and the Player (W, A, S, D, Space, Shift) ...

• This might happen also in Server (Generate new world in Server or copy / paste Singleplayer generated world into Server's directory, then start the Server and set the gamerule);

Screenshots & Video Uploaded;

New Example World Seed: -6680014990359507554

Example Video: http://www.mediafire.com/file/dftes4tk11whu2b/Spectator_Chunks_Bugs.mp4