Indeed we are aware and fixed this in IAP 3.0.0 (which is in preview) but you should wait for the official release before releasing a product in production using 3.0.0
3.0.0 is the top priority for the team right now. Although very unlikely that we will be releasing before the end of the year, I can saw that early 2021 we should be releasing the new version.
For more information: A combined com.unity.purchasing package, merges the Unity IAP plugin: 3.0.0