Bug report: Overwriting DOI with a non-DOI number

[mjthoraval]

The plugin replaces some DOIs with a number.
Steps to reproduce:

1. Import the following article with this DOI with the Zotero Connector: 10.1209/0295-5075/110/10001
2. The correct DOI appears after import.
3. But after some time, the DOI is replaced automatically (no input from me) to: 2020031311332586.

Other examples:
10.1209/0295-5075/110/10001 -> 2020031311332586
10.1209/0295-5075/110/46002 -> 2020031311343294
10.1209/0295-5075/110/47010 -> 2020031311343107
10.1209/0295-5075/110/40002 -> 2020031311350371
I have noticed this behaviour only for the papers in this issue of the journal.

Using Zotero 6.0.19-beta.1+26847c672 on Windows 10, DOI Manager 1.4.2.
The problem goes away when the plugin is disabled.

Settings:

Related report in the Zotero Forums: https://forums.zotero.org/discussion/101170/bug-report-overwriting-doi-with-a-non-doi-number