Import preference set to "stop importing" but continuing to import

Problem: I set a linked account to “stop importing” but it continues to import all data, which is leading to 100s of duplications in transactions.

Background: I had one bank account linked, which stopped importing (presumably due to security upgrades). So I had to re-create the linkage which caused a duplication in this bank account. So this bank account was linked twice. I did not delete the original linkage because that would have deleted imported data. Unfortunately after multiple attempts of setting the original account to “stop importing” it continues to import and duplicate 100s of transactions. Any fixes?