Any way to retime audio slower than 3%?

I've been trying to do some significant slow motion using the retime feature. I can get 30fps video going slower than 3% (yes, it's a bit junky but that's desireable for my needs). But whenever I try to slow 48khz audio down past about 3.5% the waveform goes missing and there's no sound. In case it matters I'm using preserve pitch.

Any trick to getting the audio to go slower than 3%?

(I know that it will also be full of processing artifacts --- this is okay with me, I'm interesting in the sound it's already producing at 5%).

Export the audio file. Bring it back in and process it again.

Take it into Logic Pro X maybe.