I have a '96 2188 that I purchased this year, and it worked well for all of wheat harvest and about half of milo harvest. I have been cutting 100-110 bushel milo at 5mph, but starting yesterday, the return grain elevator started plugging, even when slowing to 3mph. There seems to be a lot of grain coming out of the bottom side of the elevator, but the auger on top seems to be working fine. Has anyone come across this problem before?