If the edge is breaking down, it usually is, the bevel was not “Completely” set, too much pressure or defect in the steel caused by Cell rot, aggressive low grit honing or too thin a grind angle.

Since you have shaved with the razor, I would suspect, the edge got wiped and was not completely re-set. When you hair tested, it cut hair on a part that was set, giving a false positive test.

Most problems of sharpness are probably due to the bevel set.

Develop an absolutely positive bevel set test technique, looking at the bevel straight down on the bevel with magnification is the quickest, complete test of the whole edge.