The relevant commit is
here, and its title is: "MAINT-3511 FIXED When one surface of mesh object is set transparent all object is invisible : compare rotation quaternions with predefined epsilon", meaning you'd only see the difference with the previous code on very specific (and very rare) occasion... The fix for the new target omega code was already in last week's releases, but I extended it this week to the old code (which is still the default, because it's just better).