Any luck with Kindle rebates?

My Disney+ and Readly rebates have triggered without issues and I've received my Hi token pay outs almost instantly. Yesterday my Kindle Unlimited subscription payment was due but the rebate did not trigger. I suspect that this may be because the payment title is "amazon.co.uk" without any reference to "Kindle".

Has anyone else had success with the Kindle lifestyle subscription perk?

The great rebate table created by the community doesn't unfortunately include much information regarding the Kindle rebate.