I have my bread machine GF recipe down to a T. Adding a half cup starter to the regular recipe worked really well, tasted really good, and next time I think I'll add it from the "discard" jar in the fridge.That is great Sally. GF is a tough bread to make.
Change just one thing at a time, to see if it works.

Guess we will be serving it over the pie as a sauce! Got distracted when my beautiful GirlChild walked in and started visiting with me as I was assembling the pie, lol!
Oh my! I had just told her I never make it the same way twice, but THIS.... This takes the cake!