Blender Version
Broken: master, 2019-03-19

Short description of error
If a tool is registered by an addon through bpy.utils.register_tool. The keymap it references will not work.

Exact steps for others to reproduce the error

1. Turn the ui_tool_simple.py template into an addon by simply adding an addon header (like the one in addon_add_object.py);
2. Install the addon and save preferences;
3. Close and open Blender;
4. Try using the tool registered (It does not work).