I created a report in Jasper Studio 5.6.1 that used a time input control. Published it on JasperReports Server AWS. Created an input control for my report with the type time. I happened to find that when I enter time between 12AM and 12:59:59PM, the return value is okay, while after that it is entered_time-12hours. i.e. it returns 01:25:28 for both 01:25:28 and 13:25:28.
I found the reason. There is an ugly incorrect definition in files:
ISO_8601_TIME_PATTERN is defined as "hh:mm:ss" while it must be "HH:mm:ss"!