Windower Windows Showing Wrong Names

Hi I have looked around and cannot find any info as to why this is happening. Sometimes when I log onto a mule then back to main the name I see as I alt tab though characters stays as mules names. This doesn't cause any problems with playing or anything it just gets annoying when I try to tab to certain character.

If anyone knows why this happens and how to fix it would be awesome.

Cupper, apradar also doing it