Help with what MS Word insists is a comma splice?

Question

I usually either accept or work around Word's grammar suggestions (I hate having red/blue lines in my documents) but this particular suggestion has me stumped. The sentence is "Striding forward with purpose, she bit her lip and suppressed a shiver." Word insists that this is a comma splice, but "Striding forward with purpose." would be a sentence fragment due to the lack of subject, right? Am I being an idiot?

Answer 1

You are not an idiot. MS Word is.