So trad, not wfp?
I had one today (always been a bit, 'funny', if you know what I mean) say there's a big scratch etc./don't call anymore etc. No problems up to now. Very unlikely to be me (eg, why just the one pane?). Hundreds of other happy bods, but Mr and Mrs Professionals-You-Know, who have not once smiled or even exchanged the merest of pleasantries in three years just so happen to see a scratch (not that I have been invited to look at it).
Like I say, not likely a fabrication issue.