Unique Flasks are empty after dying in map

As topic states unique flasks like olroths and dying sun are empty and dont recharge after dying in map and reentering.

I have tried removing and reequipping, only thing that fixes this is making a new map...

Are you doing maps with the Searing Exarch influence? One possible downside is "Player gains: reduced flask effect duration/increased flask charges used"

The flasks appearing empty is a visual tell for "this flask does not have enough charges to be used". If the flask requires more than its max charges to be used, it will appear empty even when it is on full capacity.