Yes. You are right ... if we cannot re-produce ... we will forget about it.
So far ... cannot reproduce.
What bothered me about it though ... was that only a very tiny vertex jiggle would make the problem go away. And the ISSUE is not really with triangulate. That just uncovers a larger problem. Even if you "look" at the bad end cap (lets call it evil) ... the problem happens. FREEZE.
I can tell you that some edge collapse did happen to make this item. It was a proactive edge collapse ... to introduce some asymmetry to cylinder for unimportant reasons.
So far ... cannot reproduce.
What bothered me about it though ... was that only a very tiny vertex jiggle would make the problem go away. And the ISSUE is not really with triangulate. That just uncovers a larger problem. Even if you "look" at the bad end cap (lets call it evil) ... the problem happens. FREEZE.
I can tell you that some edge collapse did happen to make this item. It was a proactive edge collapse ... to introduce some asymmetry to cylinder for unimportant reasons.