There's a reverb project on GitHub, and the maintainer is having trouble finding a bug. I know I know, what project on GitHub doesn't need help... Anyway, the dev says:
"I just recently made an attempt to fix the overflowing feedback buffer but haven't had much success yet (it's in the feedback-fix branch). This would definitely be easier if someone with more juce debugging experience than me could contribute."
I know nothing about juice, and close to nothing about coding. Just thought I'd post this here in case someone wants to help.