OK, with the Instruments file and the full logging I can see what is happening here (and why I missed it) – it looks like only if the session can’t be gracefully stopped due to audio conflicts it orphans the decoder in memory as an alternative to causing an exception, and this is an edge case missing from my testbed. I’ll add a test and fix this in the next update as a high-priority fix, thank you for your report. With some luck it could be this week or next. For your own info, it’s a issue with OpenEars and not with the plugins.