The method flux.file.IncludesFileCriteria include(String filePattern) defaulted the file minimum count to 0 instead of 1.
The file minimum count is the number of files that must be matched.
This bug, when triggered via the method above, caused file criteria to be satisfied immediately on the File Exist Trigger and the File Not Exist Trigger, causing those triggers to fire prematurely.
The bug will be fixed in Flux 8.0.16, Flux 8.1.3, and Flux 8.2.