I've had issues with them toggling back on and causing conflict.
Download the json from settings backup, parse to the disabled extensions and then forcibly uninstall to ensure no further sync issue.
cat extensions.uninstall.json | jq '.[] | select(.disabled==true)' | jq '.identifier.id' -r | while read -r key; read -r val; do
code-insiders --uninstall-extension $val
done