Slow AnkiConnect may cause duplicate cards even when they are disabled in Yomitan settings

[pinntokuru]

Description
Sometimes when a card add is triggered AnkiConnect can be slow due to whatever reason. It is possible to quickly trigger another card add either via the green add buttons or the Alt+E and Alt+R shortcuts before the first card is added, causing duplicate cards in Anki. This can occur even when "Prevent adding" is selected for the "When a duplicate is detected" option in Yomitan. After the first card add is completed it is no longer possible to add further duplicates.

The issue can be reproduced by simulating a slow AnkiConnect via adding a sleep statement in AnkiConnect's "addNote" function in its init.py file. Repeatedly clicking the green add buttons or pressing the Alt+E/R add card shortcuts for a new word in Yomitan while AnkiConnect is sleeping eventually results in duplicates.

Browser version
Firefox 133.0.33

Yomitan version
24.12.12.0