Shuffle output of find with fixed seed

I would like to shuffle output of find BUT with a fixed seed, so that every time I run the command I get the same output.

Here's how I shuffle:

find . -name '*.wav' | shuf

The issue is that every time we have a new seed -> new order. My attempt to fix it:

find . -name '*.wav' | shuf --random-source=<(echo 42)

That works only on occasions (i.e. just a few cases, in a deterministic way). Most of the time it fails with:

shuf: ‘/proc/self/fd/12’: end of file

Same error is produced by e.g.

seq 1 100 | sort -R --random-source=<(echo 42)

That I have seen being used in other places.

This works though:

printf '%s\n' a b c | shuf --random-source=<(echo 42)

Why is that? And how I can fix it? I am open to any suggestions. Output of the find is a part of a larger script. The solution should work for bash and zsh.