Component bug in BP

I’m having a problem of unknown origin.
I have 2 instances of TabkBarrel component sitting idle with a purple icon on the component list of the Tank_BP (see image)

On hover the help bubble shows the following:
TankBarrel (none)
Source: this blueprint
Mobility: Non-scene component

I can’t give my real TankBarrel its proper name because they take it, and when I try renaming one of these UE crashes.
I suspect it is also causing problems with my AI Tanks, as I started getting.

I can’t find any reference to that purple icon on UE forums either.
Anyone?

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