App crashes to Garmin logo on VA-3

Some new users installing my raceQs app on  Vivoactive3 are crashing to the Garmin logo at start-up.

The Log reports: 

Error: Symbol Not Found Error
Details: "Could not find symbol '00800311'"
Time: 2019-12-12T11:05:20Z
Part-Number: 006-B2700-00
Firmware-Version: '6.60'
Language-Code: eng
ConnectIQ-Version: 3.1.5
Store-Id: 74c474f8-4140-4794-afb7-f56817083bd5
Store-Version: 16
Filename: 9CC71426
Appname: raceQs
Stack:
  - pc: 0x1000fecc

where 0x1000fecc ( dec: 268500684) is outside the code area of the debug.xml

  • I have video evidence of the crash. It occurs as they open the app.
    • so not mis-reported
  • The user has re-installed with no success.
    • so not a download issue
  • I have  around 5 users on VA-3 running the version without crashes.
    • so not all VA-3's crash.
    • it runs fine on other platforms
  • I have sporadic reports of the crash, only on VA-3's
    • why only VA-3's?

How do I proceed? What further debug info can I retrieve?