Triangular shaped "bubble"? : vimarsana.com

HeiHei29er
Triangular shaped bubble ?
For my last two bakes, I ve noticed an odd cavity on the outer edge of my loaves.  And now seeing it back to back, I think I ve seen it in some of my other loaves too.  It has to be a shaping error with that triangular shape, but I can t figure out what I m doing that would cause it.  It s on the outer edge, so has to be either how I finish rolling my oblong or how I m putting some tension in the dough after shaping.
Any ideas?