Time stretch edits to audio track don't playback, even though they appear correct in the timeline

Using Premiere elements 2023. I have numerous edits to an audio track where I'm using time stretch to reverse the audio of several clips. All was working fine but after about 5 of these edits, any additional time stretch reverse audio clips don't playback at all. I've tried rendering the section and even exporting the project but the clips have no audio. They look correct on the timeline though, and the gain and audio levels are unchanged with a -100% appearing on the audio clip like it should. It's almost as if there's a bug in the software that occurs after a certain number of time stretch edits like this. Any ideas? Thanks