I experience all kinds of dissociative things when I am speaking. Not all the time. But they can happen any time. The examples I am talking about all involve another part of me talking or taking my thoughts away.
Sometimes I can hear that "I" am speaking but it is not my voice and I don't know what "I" am saying.
Sometimes I forget what i am saying mid-sentence.
Sometimes I know what I want to say and I start to say it but then the knowledge is taken away from me and I cannot remember what I want to say. (Sometimes this is not dissociative for me and sometimes I know it clearly is).