Using vSL-2.9.10, some Mark of Honor ensembles are shown as incomplete despite being previously collected.
Tried to buy one of the ensembles again, but the game does not let me use it because it is already known.
I think the issue started to reproduce after the 2.9.10 update, at least I did not notice it before.

@Goldenshacal @gbrage

I haven't looked around much outside of the Draenor vendors but this seems specific to at least that PvP tier. The vendors beside them sell the other seasons' classless pieces like those listed, which don't have 'felweave' or similar to it in their names. It seems like blizzard just forgot to add this season's ones. They're sold separately alongside the ensembles on the other vendors too.

By now, we know it's an issue on Blizzard's end. Learning an ensemble doesn't always provide all appearances, especially when individual pieces have been brought previously. Closing this issue as this is something we can't do anything about, sadly.