Attempt to changing Protomech's armor to Electric Discharge makes the unit keep invalid when using Standard armor

[binaryspica]

Environment

Ver 0.47.0
Windows 7

Description

As title says. The bug is occurs when...
1: Load a Protomech with Standard armor type(or Load a Protomech with Electric Discharge armor and skips 2).
2: Change the armor to Electric Discharge armor.
3: After then, whenever you revert the armor to Standard the validation says 'Does not have legal armor type.' There is no way to get around this, unless load an another Protomech without the bug.

It seems that Electric Discharge ProtoMech equipment(that is automatically installed on the Torso if you check Electric Discharge armor, per its construction rules) is not removed when you change the armor to Standard and only hided, and it would causing the error. But that's only a guess and I can't sure about this.