Do you have a video you can post? It's hard to guess what may be going on without a video.
Are you leaving the 1st barrel wide? You may not be getting over enough for her for the 2nd barrel.
Are you inadvertently asking her to turn too soon?
Are you looking at the barrel?
Are you trying to hold her off, by turning her head away from the barrel, causing her to shoulder in?
If this is a sudden thing she started, it may indicate that she is hurting somewhere.
Again, a video would help see what is going on.
∞•*˚ Βгįťţαňγ ˚*•∞
It is not enough to know how to ride; one must know how to fall.