WARNING, wav player still referenced!

So I was going through fonts while watching the serial monitor to solve an error in font directory.
I solved the issue, all good.
I did however notice that the warning in my title keeps appearing after every font swap.
What exactly does this mean/do?
Worth solving?

Originally, this warning meant that there was a problem in the code somewhere. However is is not all that helpful nowadays, because the sound library (and other thngs) tends to hold on to references to wav players. Basically, you can ignore it.

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