Yeah, that problem is all in the feed system and unrelated to short-stroking which is one of the main causes for a true "stovepipe".
You had a lot of mis-guided answers in the beginning because of that description. Stovepipe is the fired case left hanging out, in "true" fashion with the mouth pointed out of the action and the whole case trapped there by the returning bolt (rifle) or slide (pistol).
That there is a feed failure, and many of the possible causes related to the round being loose under the clip's feed lips when the bolt comes forward to pick up that round. NOT being held properly in place by either the next round down, or by the follower for round #8, lets a double-stacked round move to the center and pop up like what your picture shows.
I have never personally seen that type of mis-feed in a Garand, but a bum magazine in an AR type resulted in the round getting rather impressively wedged up against the gas tube in the worst, most gun-disabling jam I have ever seen. There's a "perfect storm" up there above the AR's bolt carrier, with the size of the case head/body just being way to close to the width of the channel for the charging handle. So there's LOT to be said about this particular advantage of an open receiver design, for that type of mis-feed (FTFd in my acronyms--"FTF" can refer to fire OR feed and I've seen the same letters used for both. Failure to fire should be FTFr. I have a similar opinion on failures to extract and eject...)
So, there are multiple reasons that could cause the cartridge to pop out of the enbloc clip, and approaching it from the simplest to the most involved makes sense.
