The 9250 has Stainless belt guards behind the  sickle,  and in the pics I have, appear to reach back over the draper belt some.       Agco view it as rock protection.

Are these removeable ?

They appear to create  a very large  dead area immediately behind the sickle, and also appear to creat a large step up  from the sickle to the belts.
I am concerned  that VERY short and light  crops (cereals)  would tend to bunch there and fall off, -never getting to the draper belt.    Probably most of you have never had such crops, but we get them.  These are crops where  about all you can cut is the head , if that.

Id also suspect it could be a problem in conditions when you get a lot of pre-thresh happening with seeds falling out of heads on the table

I would imagine some sort of air reel might help this  significantly, but id rather beat the problem at its source