Hi there, just adding some info here, found the same issue with one of the latest builds (05-14 and 05-10).
Sep 10 2019
Jun 27 2019
May 16 2019
This is probably a duplicate of this too https://developer.blender.org/T64466
It is easier to debug this sort of thing if we have a .blend. Got one?
Apr 4 2019
Mar 3 2019
Jan 24 2019
Noticed the same issue, this is especially annoying when working with real world measures and small objects, since you have to get close to model.
Dec 8 2018
I thought the change was intentional, it felt really good to select loops by just double clicking it. Consider bringing it back? Because now, double clicking is not bound to anything in a mesh's edit mode.