TL;DR:
Inspect Spirit stats of any given character to load their information into the HUD.
I have a similar problem as well. After further investigation, the weapon and vitality stats only refresh once the spirit stats are loaded into view with any character. Otherwise they display the weapon and vitality information of the previously displayed character.
OS: Linux
Steps to Reproduce:
1. Inspect the Spirit stat of any character in the HUD.
2. Inspect the Weapon and Vitality stats of any other character without inspecting their Spirit stats. Note the states of the previously inspected charters states display over every character.
3. Inspect the Spirit stat of any given character again to load their information into the HUD.
Temporary fix aka TL;DR:
Inspect the Spirit stat to load the character HUD information.