FileChangeTrigger works fine for .xls file but for .xlsx file its getting triggered twice

Has anybody else faced this issue? I am on latest version of UiPath and my workflow works fine for normal .xls file but its triggering twice even though I am copying single .xlsx file in to directory that is being monitored for file creation.
I have not given file name in the monitor file change property. If I give exact name of .xlsx file then event is triggered only once.

Not sure if I am missing anything.