On my side, the button|key associated with "Show Items" (in the options) has to be pressed for filtered gold to be auto picked up.
I'm not 100% sure, but i believe it has always worked that way, even before loot filters were introduced.
hasn’t been the case for me, it would still pick the piles up, I have piles under 8k hidden because otherwise I’ll stand around and wait for wirts body to stop shooting out money I am a weak person