Environment:

• Xcode version: 11.0
• Firebase SDK version: 6.11.0
• Firebase Component: Core, Messaging
• Component version: 6.3.2, ~> 4.1.7

Problem:
My project keeps crashing at [FIRInstanceIDTokenManager checkTokenRefreshPolicyWithIID:] function.
My app collects location in suspended state if it exits a region. My assumption is this crashes happens at that time. Not always though.

Steps to reproduce:

Configure the firebase project and make sure the app is launched from suspended state multiple times

Attaching my crash log here
crashReport.txt