AUMatrixReverb broken on 3.2.0

The AUMatrixReverb plugin, either used as a Real-time Effect or the old way, no longer works in 3.2.0.

Activating it, results in a (painfully) high pitched stammering squeel for a few seconds and then silence.
The affected track is either silenced or squeals intermittently.
It can also result in Audacity crashing.

MacOS 10.13.6 / Audacity 3.2.0 (24.1 KB)

Testing with 3.2.0 on macOS 12.6 Monterey

I cannot reproduce this - the AUMatrixReverb plugin works fine for me in
a) the effects stack
b) as a standalone destructive effect