The issue with the collisions bug has proven particularly tricky to resolve. We have one more patch release for you to try to ensure the problem is fixed. Welcome to the beta channel! Please remember beta releases are opt-in and can have issues like this. You can stick to stable releases if you prefer less potential disruption, but note this is our first .3 release since 2012, so issues persisting over releases to this extent are generally exceptional circumstances.
As mentioned previously we'd like to release a stable release soon, but if this particular bug further evades us then there may even be a .4 release! Let's hope this is the end of it.