Is the queue actually stuck, meaning, can you try optimizing an image from your media library and seeing if it doesn’t optimize?
images are in status ‘In progress’ for 4 days. Queue status: idle. They are stucked, it’s clear.
Tools->EWWW IO menu?
as I said this does not work, queu still here.
Today I found another clear button in Settings->EWWW Image Optimizer – and it works! Queue was cleared and now all works fine!