We’ve noticed that attributes occasionally have their references switched without anyone touching them. For example, if a script has a reference to the leaderboard that may all of a sudden change to a reference to the audiomanager. This is something we’re wasting a lot of time on. Especially if the issue isn’t discovered before we build and things start to break in our game for no apparent reason 
I’ve not been able to pinpoint why this happens, but it’s not just one project – we have at least two games in development that exhibit this problem. Both games also have a team of people working simultaneously so I guess PlayCanvas has to juggle a lot of simultaneous input. It’s definitely very worrying.