I understand MoB changes the 'Dodge' into a 'Shift', so there is room to argue that this is working as intended for Prismatic Hunter. However, There are some aspects of this build that seem to be working as intended, making me believe it should still work the same none the less. That being said here is the step by step Scenario.
1) Use Combination Blow
2) Shift-Dodge near enemy to refund melee (working as far as I could tell)
3) Use Combination Blow again to refund Shift-Dodge (does not work)
Alternative Scenario
1) Follow the Scenario above, then use your grenade on a cluster of red bar enemies. (kills refunding melee faster I think)
2) Continue to kill using x2 Combination blow or weapon without Pugilist perk to refund melee completely
3) Use Combination Blow again. It should refund your Shift-Dodge this time.
I tested this using OUTREACH -Class Item Armor Mod- just to get a bit more melee back faster after Shift-Dodging, but I used no other Mods that benefit refunding abilities to keep this as clean as possible. I also did this with out OUTREACH-Mod-, it just helped make things go faster.
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MOB sets your class ability energy at 0 for the duration of the 11 second surge buff. Normally doesn’t matter, except this exact scenario