I think I'd take the straw away to remove the risk. You appear to be putting plenty back in to justify its removal.Rarely remove straw (only if we can swap for muck)
Fresh wheat, barley or oat straw all as bad as each orher for hairpin especially when shallow seed depth, all seem better after a bit of time / weather but you sometimes don't get that with OSR due to drilling date
I find the 750a can and has grown good (2t/ac) OSR crops drilled into chopped wheat but it's not as consistent
I'm told OSR after oats simply will not grow ? And I seem to have worse yields after barley than wheat from experience so far
I'm happy with my OSR after WW, could be better but that's an issue outside of my control and will learn from the experience.
I think my osr went in two weeks after the WW came off so no real time for anything to break down.