Hi Scott,
Thank you for your interest in Syncfusion Products.
I have tested the issue with the simple sample in which I used AutoComplete control with TextBox. I am afraid that I was not able to reproduce the issue. Please refer to the below sample and the videoclip that illustrates this:
Sample:
http://websamples.syncfusion.com/samples/Tools.windows/51161/main.htmVideoclip:
http://websamples.syncfusion.com/samples/Tools.windows/51161/Videoclip.zipIf I am missing anything, could you please let me know in detail so that I could work out in depth and provide you a better solution at the earliest?
Please let me know if any concerns.
Regards,
Fathima