Steps
Try also to look at app.renderer.plugins.sprite.sprites before and after destroy them all

Which version of the lib is this?
sorry in the example is 4.4.4 but it also happen with 4.5.2
here it is the correct test case with the last pixi version
test-4.5.2.zip
Thanks @lucap86 for the details, we'll look into this as soon as we find time.
Any update on this? We're facing the same problem of having lots of tiny memory leaks that would be good to address.
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Most helpful comment
Thanks @lucap86 for the details, we'll look into this as soon as we find time.