A family of Microsoft word processing software products for creating web, email, and print documents.
I have been having the same issue and can't seem to find a concrete resolution. A few people in this forum say to change your cite while you write preferences to scan for temporary citations every 600 seconds and that way it will only switch every 10 minutes. Haven't tried it so I don't know if it works or not.
My Endnote plugin has "scan for temporary citations" off and it still happens. People in the thread tried to disable Endnote plugin and it did not help. When I have time I will try to remove Endnote completely and see if it helps.
Apart from Endnote, all other plugins are pretty standard - (1) Acrobat PDFMaker Office COM Addin and (2) Instant Messaging Contacts (not even sure what program added it there and why).
Again, try disabling all of the Add-Ins. Adobe Add-Ins are well known (in the past) for causing problems. That the writer of the program ought to know better does not mean that they do.