System Information
Operating system: Darwin-17.7.0-x86_64-i386-64bit 64 Bits
Graphics card: NVIDIA GeForce GTX 970 OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-10.33.0 387.10.10.10.40.108

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e
Worked: (optional)

Short description of error
A modified keymap saved from "Industry Compatible" will lost it's attributes after restart.

Exact steps for others to reproduce the error

1. Goto Keymap preference, Select "Industry Compatible".
2. Press the + button to save a new keymap profile. Restart blender.
3. Keymap 2~3 for edit mode doesn't switch to edge and face mode. It exit to object mode on press.

This is Blender's industry compatible default.
After saving a new keymap profile, restart blender will become this.

The missing attributes will return when switch back to Industry Compatible. So the current solution to solve this is set the keymap back to industry compatible, then select custom keymap again.