Please fill in the following fields:

Unity editor version: 2019.3.0f6
Firebase Unity SDK version: 6.12.0
Source you installed the SDK (.unitypackage or Unity Package Manager): .unitypackage
Firebase plugins in use (Auth, Database, etc.): Auth, Analytics, Functions, Crashlytics
Additional SDKs you are using (Facebook, AdMob, etc.): Facebook
Platform you are using the Unity editor on (Mac, Windows, or Linux): Windows
Platform you are targeting (iOS, Android, and/or desktop): iOS, Android, WebGL
Scripting Runtime (Mono, and/or IL2CPP): IL2CPP

Please describe the issue here:

(Please list the full steps to reproduce the issue. Include device logs, Unity logs, and stack traces if available.)

Using Firebase Analytics, submit the event EventAddToCart with the parameter ParameterItems. Notice the Unity Documentation says ParameterItems should be of type (NSArray). Notice Parameter does not accept Arrays and only accepts string, long, and double.

Please answer the following, if applicable:

Have you been able to reproduce this issue with just the Firebase Unity quickstarts (this GitHub project)? No

What's the issue repro rate? (eg 100%, 1/5 etc) 100%