The script recognises two types of quotes as different names for the references. For example, "autogenerated1" and 'autogenerated1' are considered as two different references, though they are the same for the MediaWiki engine.
As a result, it first places "refname" (for example, first edit), then (sometimes) makes an edit of just replacing one type of quotes with another (for example, this one or this one).
I wouldn't consider it as an important issue but it also breaks the article when places "autogenerated1" with one link and 'autogenerated1' with a different one. It took me some time to catch this bug.
For example, please, have a look to this diff and especially to "автоссылка7" (name for "autogenerated7" in Russian). The article had inside:
<ref name="автоссылка7">[https://seekingalpha.com/article/4160521-china-demographic-crisis-economic-outlook]</ref>
During the edit, the bot creates a new refname:
<ref name="автоссылка7">[https://www.sciencedirect.com/science/article/pii/S0304393219300261 Aging and deflation from a fiscal perspective - ScienceDirect<!-- Заголовок добавлен ботом -->]</ref>
At the same time, it changes the quotes in the existing "автоссылка7" to 'автоссылка7' and everything is broken.
I was searching through the code, where the quotes' behaviour is defined but haven't found it yet.