portal bug in build mode

KoGaMa Profile: kogama.com.br/profile/1227778/
Web Browser: Chrome
Client: Standalone
AboutMyBrowser.com Link: aboutmybrowser.com/0xVlwPyX

Steps to Reproduce
This bug is for my friend KoriKaytoz

step 1- put a portal in build mode

step 2- enter the portal and 1 frame after you appear elsewhere press P to return to the previous portal

this bug is a little tricky to produce

sorry for my english i am using google translator



Additional Information (Optional)
www.youtube.com/watch?v=Xysz1vYXNOI&feature=youtu.be