I realized the seam placement on the exterior wall is also the same seam placement throughout the wall interior. Often I locate the seam for appearance, but to my surprise the part broke along this seam line. I didn’t realize a weak point was created, based on the seam location setting. Every layer the seam started and stopped at the same place; on every layer. It would be useful is a seam setting allowed external and internal seam options.
Use the seam painting function!
If strength is an issue, you could also consider a scarf seam, that spreads the load over a longer distance and makes it less visible also.
Might be tricky with filled filaments though.
Or set the seam to “random” so they don’t line up. The downside of this is that the part will look like it has little pit marks on the surface throughout it.