Agree with points made about dramatic weight loss. Female athlete I coach lost 4lbs recently and didn’t run to potential.
Down the line, when you are happy with overall status of athlete (weight, general health, etc) I might look at increasing speed volume while maintaining ratio: 35% speed / 65% tempo.
I have found it hard for athletes to run indoors and maintain form thru outdoors with such low vols of speedwork and like to flesh out programs with more runs at 95%.
Also, is she being massaged? Could be muscle spasms.