Endnote X7 Word Plugin

I have been using the MS Word plugin of Endnote to easily insert citations in my text as I write. As of now, I use the MHRA (Author-Date) style, so that the authors appear as follows: (Author, 2017). I regularly send my documents to colleagues to review. When they send the file with tracked changes back to me, something strange occurs: when I try to insert citations, the citation will appear as follows: {Author, 2017 #185}

Of course, this is not acceptable. Additionally, the new entry is not included in the automatically generated bibliography.

Does anyone have any pointers as to how I could solve this problem?