Posts aren’t abandoned from the abandon post prompt.
Clicking cancel in the draft successfully abandons it though.
Reproduced here on meta.
Hmm can you have a look @eviltrout?
What are the steps to reproduce? Did you click reply, fill in text and then click edit to trigger the abandon post prompt?
Most recently it was with a draft response to an existing thread thread. When I browsed back to the thread in question with my reply minimised a prompt asked if I wanted to abandon my draft. Clicked to abandon the draft, but it persists.
Still occurs now.
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I’ve had this happen to me when I am using the shortcut C key to edit a post. @steve_pd are you editing the post by using a shortcut or by clicking the buttons?
Hmm why is there a prompt to abandon when you navigate back to the topic? There must be an action to trigger the prompt. 
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I’ve tried to reproduce this but can’t seem to do so. Can you give explicit steps to follow to get it to happen? I’ve tried going into a topic, starting a post, entering another, hitting reply, then abandon and it works.
The more specific the better 
Would love to fix it.
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Ok I just ran into this and am able to repro consistently.
- Create a draft post and wait for it to be saved
- Navigate somewhere else
- Hit back
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Submitted a PR here
https://github.com/discourse/discourse/pull/3773
Guess who broke it 
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Hurrah! So I wasn’t imagining it? XD
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