It's interesting that even though this isn't in a long strip format on the source site that I can see (maybe it's different on mobile), it's one of the ones obviously designed to be "okay" read either way. (I've even found places where it looks very much like it was done long-strip and then cut up, like the separation between subsequent images was subtly not where it was supposed to be in ways that aren't obvious)
And though the current default setting is definitely nominally correct, I think I prefer it as a long-strip (...I suppose that's not remarkable unless one knows I don't normally prefer reading single-page manga long-strip style); so it's a pity one has to fiddle with the page's CSS to make that happen in the reader, without the little separator gap between images.