Welcome to the forum.
Can you please make your workout in training peaks public and share the link?
It will help everyone to review the test.
I have no idea how to interpret my heart rate drift test, despite watching video a bunch of times. I understood the test instructions to say to keep your heart rate as close to your rate when it first stabilized. So I did that, altering my pace to do so. The first half of my run, shows a 4ish% pa;hr. The second half shows a negative. And my pa;hr overall was -2.22%. So I am completely lost here. Any help would be welcomed. I will try to attach my file here.