Juryiel it's not just experience. I usually don't have time to just sit down and write out all the tests involved in both comparing versions and creating a detailed bug report.
My game has been something I have been working with on the side, and this issue has only really come up in devices that are less powerful than my laptop. So of course if after 6 hours of work I export and only see ugly pauses in my game, I need to move on to homework or whathaveyou.
I will get something together as soon as I can. My plan is to simply export for web in r202, and then r195 - both the same exact project. And neither of them use anything implemented in between so I shouldn't have issues there. This should be the quickest way to get something visible available.
Edit: also, just to clarify, I keep saying this isn't a slowdown, but tiny obvious moments of lag that don't make the game unplayable, rather, frustrating.
I mean hell, otherwise physics area great!!!!! It's simply this one issue. That's it. Performance is AOK otherwise.