Galaxy S10 and I'm having the same issue. As previous posters stated, I'm posting in the hope that Samsung sees this and can come out with some sort of update to correct the issue. It's a small but annoying issue.
I really haven't tried anything because I truly believe it's a software issue and something an update can fix.
I will say that I thought maybe it was my bluetooth causing the issue because it's a second hand or third party earpiece but it's not the cause, I was able to rule it out.