Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e
Short description of error
In 2.79 after committing any transform operation with a middle-click Global transform axis is set by default (primary), while axis selected in the "Transform Orientation" menu becomes a secondary option, in case if you change transform orientation by pressing the axis hotkey again.
In 2.8 it goes another way around, setting selected transform orientation as primary upon middle-click, which makes fast gizmo-free transforms somewhat problematic.
It should always be Global orientation set by default upon a middle-click transform lock.