Hey there developers, I have created this post to share this extremely troublesome bug I located.
Basically custom starter character is causing some problems, but actually letting the players use their own character fixes the problem. I have a slight suspicions that it was somehow connected to the custom animations I was running, however more in-depth testing resulted no problem about the animations. Another hypothesis I had was connected to the humanoid state types, but that also seemed to be incorrect. Well finally, I gave up trying to debug it on my own. Any help will be appreciated. Thank you developers.
https://gyazo.com/02741891026ed19fd4c5b91ab5a09003
https://gyazo.com/40a7fc0184ce1f193cb63fb54894be26
T
.