Shaking Camera After Teleporting, Behaviour Pack influenced

Verification builds:

Ver. 1.6.0

Summary:

When you press the button next to evil. it accidentally activates two sets of function which causes 2 teleports, 2 spawnpoints, 2 world spawnpoints and 2 tickingareas to be added or changed.

you then end up having a shaking camera or something seems to be rendering double or rotating pretty fast.

however I tried removing unnecessary stuff from the world. I removed alot of chunks but if I prune more of the starting area the bug goes away. things that I found out: 

• if you remove the 'Main' tickingarea (where the redstone is located) then it also dispears (see second video)

Impact:

it easily avoided if I don't activate both sets of commands like I intended but forgot. this bug seems to be a really weird combination of tickingarea and double teleport.

Repro Steps:

• press the button next to the evil button.
• bug appears.

Observed Results:

• shaking camera.
• camera is confused?
• world is sometimes not loaded.

Expected Results:

• **normal camera.

Screenshots/Videos attached: Yes/No

*[https://www.youtube.com/watch?v=v4ED2zFtAQs&feature=youtu.be
https://www.youtube.com/watch?v=CkyQhEsEgUc&feature=youtu.be|https://www.youtube.com/watch?v=v4ED2zFtAQs&feature=youtu.be]*

Regression Build

no idea.

Notes:

Oh boy this bug is a fun one. but not important so no worries I just taught it best to still upload it. cause something funky is going on.