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TL4242-Q1: Pin 3 GND circuit opened

Part Number: TL4242-Q1

Attached is an X-Ray picture of a failed LED Driver (TL4242-Q1) from the top side. We observed that Pin 3 (GND) internal seems to have open circuit which seems to be common problem with past few years of return of more than 150 modules. Each modules contains six of these TL-4242-Q1 LED driver. At most all six failed and minimum only one failed in the same manner.

In reference to the picture, Pin 3 is located on the top most row of pins second pin from the left. Notice the broken circuit from the lead towards the IC internal circuit.

Could you advise, at what circumstance would the internal circuit for Pin 3 (GND) be opened in such manner? Please let me know if you need more information do let me know. Thank you for your help and attention.