Infernus T3 Flame Dash and Extra Charge/Rapid Recharge item not working as intended

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Observed:
Flame Dash T3 charge counter doesn't change when Extra Charge purchased. Charge counter increases by 1 when Rapid Recharge purchased.

Expected:
Charge counter increases by +1 when Extra Charge purchased (Total: 2). Charge counter increases by +2 when Rapid Recharge purchased (Total: 3).