It seems that when a user’s suggested edit gets rejected they can simply re-suggest it, and given the current state of affairs of the suggested review queue the suggested edit is quite likely to be approved (or if not this time, then it will almost certainly be approved if they are persistent).
Should there perhaps be some sort of delay until a user can suggest an edit after their suggestion was rejected for the same post? Perhaps a check can be made how large of a difference there is between the two suggestions (though I’m not sure it’s worth doing just for this, and a delay is probably sufficient)?
I do understand that a user should be able to re-suggest an edit after it was rejected, since after all perhaps they made a better suggestion after seeing that it was rejected, however in cases like these I don’t think that is what is happening.
I did see this old post saying that after some rejected edits a user cannot suggest any further edits until a week has passed, but as this is clearly not happening here I guess that may have changed since that post.