3 hours ago, Bass_Fishing_Socal said:

This was 14lb mono to 30lb power pro.

This combo with a good knot will not break on the braid side.  Maybe counterfeit junk after all.

50 minutes ago, MickD said:

If it pulls loose it would still retain the clean cut you made when you cut the tag off.  If it breaks it will not look like a clean cut.  So a slipped knot will have a clean end; a break will have lots of micro fibers loose.

Agreed. You have to look closely to see that though. Unlike when a knot slips loose with mono or flouro, in which case the coiled up line is a dead give away.