Possible presence of glass in PC brand sweet chipotle prepared mustard

It would be interesting to find out how the glass may have made its’ way into the food product. What was the root cause that led to the possible contamination?

CK Reviews

Loblaw Companies Limited has recalled one specific lot code of PC brand Sweet Chipotle Prepared Mustard from the marketplace due to the possible presence of glass.
Consumers should not consume the recalled product described below.
PC Sweet Chipotle Prepared Mustard, 180 ml, 2018, AL 120 60383 01392 9
Check to see if you have recalled product in your home. Recalled products should be thrown out or returned to the store where they were purchased.
This recall was triggered by the company. The Canadian Food Inspection Agency (CFIA) is conducting a food safety investigation, which may lead to the recall of other products.