Yeast flavor in the dregs, I get it. Yeast flavor in the wine, I’ve never experienced without also tasting the sweetness from a fermentation that is not complete.
I would strongly recommend topping off with a similar wine, or a wine that compliments your wine, a wine that would be considered a blending partner.
Last resort, in my opinion, is to add inert objects, like glass balls, plastic rods, etc. My wines typically benefit from getting blended, so why not add that blending partner to top off. That’s what I do.
As always, there are alternative approaches that others have found successful.