I had this issue starting yesterday morning – and you’re the second person today to bring it up. Seems like something may have changed on Netlify’s end to make this more prevalent. It seems that this is a bug from an older version of Prisma, but upgrading Prisma to 2.9.0 (which Redwood 0.20.0 does) fixed the issue for me.
Also, if you run into any build errors when you deploy your upgrade to 0.20, you might want to take a look at this thread in which @thedavid was nice enough to help me out.