Unable to move coin earnings to Zero

Hi it's been going on for a while now but starting to annoy me. I am unable to save settings once I move any selected coin earnings to zero on the slider. This means I will always have a dust earnings on atleast 1 coin and it's loosing me money. Why did this change and is here a fix? The save button greys out as soon as you move any coin to zero earnings, does anyone else have this problem?

why bother, no one cares.

Does it delete any earnings for that coin though?