Flicker Strike combo buildup, bug?

Flicker Strike only builds up 1 combo, just it's first hit. The rest of the strikes don't build up any combo points.

I have to imagine this is a bug because every hit after the first one are also considered "strikes". It also can't be just 1 combo per use of skills because obviously whirling assault gives combo for every hit in it's twirl, up to 7? in one skill use.

I bring this up because of monk's new combo point nodes opening up more build options with combo. Surely they fixed Flicker Strike combo?