On Disruption overcharge upgrade, available for SM, AM, all eldar - the description states:

At a glance, this seems to not apply at all.
Additional testing had revealed that it does affect Aeldari fields, but does so irreliably.
Sometimes, i do notice the holofield taking 3 damage and not regenerating for 10 seconds.

Is this functionality intended, but the chance is not reflected in the tooltip - or is the functionality itself currently faulty?