Consider this suggested edit of mine.
My edit conflicted with heemayl's concurrent edit, which was applied immediately since he had more than 2000 reputation.
So at the time of the review, since my edit only addressed the readability of the code, while heemayl's addressed the grammar as well, the first reviewer rejected my edit as "This edit defaces the post in order to promote a product or service, or is deliberately destructive.".
Eventually the Community user rejected it as "This edit conflicted with a subsequent edit."
From this answer:
You submit a suggested edit at the same time as the original poster or a 2000+ rep user (20000+ in the case of tag wikis) or any moderator (in other words, anyone who has full edit privileges over the specific post). In that case, your suggested edit will be rejected by Community in favor of the fully privileged edit. Since the Community user does not provide a message when such an edit is rejected, it may appear as though the system has rejected your edit immediately, without warning. Don't worry! This has nothing to do with bans, or your profile being banned from suggesting edits. Just try submitting your edit again and it could make it to the review queue.
In any case, suggested edits rejected by Community are not counted towards the suggested edit ban.
So this time everything went smooth, but the Community user took around 7 minutes to reject it.
What if the Community user doesn't make it in time to reject my suggested edit before another user rejects it?