Hi,
I appreciate the help.
Its happening both in chrome and as well as in firefox.
Chrome’s version is Version 64.0.3282.186 (Official Build) (64-bit). But have checked on other versions too and same case exists.
My Cocos Creator version is - 1.6.1-beta.2 , because its free from this known issue -
I am uploading the demo project here.
Just start the server with npm start on the folder.
And enter url http://localhost:3000/pm/ in any browser
Then you can notice yourself, when FPS drops , you just change the tab of main (entry scene), and then check spawned tabs, they will get their fps around 60.