Hi Travis,
I have tested for this issue using version 4.4.0.51 and was not able to see the problem. This is how I went about testing this issue :
1.Run the attached sample.
2.Click Lexems several times.
3.Exception is not thrown.
Please let me know if I am missing something. Also, Could you please let me know the version of Essential Studio being used by you.
Thanks for your patience.
Regards,
Ebenezer.P
sample