Apparently  buyers can override automatic feedback but I have no idea what shows at the buyer's end, whether it shows   "Leave Feedback " or something else.

"Automated feedback from eBay will remain visible unless your experience was less than positive, for example you opened a return request, you didn't receive the item, or the order was cancelled.

You can still leave your own feedback about your experience which will replace any automated feedback already left"

The following thread is a prime example.

The OPs negative feedback was removed. 

I asked the seller whether the iPads were new or used.

He responded  'used'  so I reported it and consequently seller NARU

https://community.ebay.com.au/t5/Buying/why-does-ebay-take-down-honest-feedback-just-cos-the-seller-...