Yep, eventually it will degrade/decay/rot and is not properly supporting the rim joist. Only is supporting the one deck plank above, now this plank has to carry the deck load.

I liken it to when PT is used as sill plate it has to have a barrier installed.

__________________
badair http://www.adairinspection.com Garland, TX 75042
Residential-Commercial-Construction-EIFS-Infrared Thermography
life is the random lottery of events followed by numerous narrow escapes