Update!
Joe your top is done.
I restitched every seam I could get to without total dismantling the top. Looks like original thread was giving up do to service life and there might have been a tension issue with the stitching. The top only needed a small patch.
Here's what we started with.
Here is the only spot that i could find need a patch.
Here is the stitches failing.
Patch in place.
Top finished!