The problem occures in the ResourceBundleEditor.pageChange(). When we switch to the first page, it'll reload the resource mediator and it'll call edit.resetCache method.
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ORIGINAL COMMENT BY chairatk, VIEW IT HERE:
https://www.jfire.org/modules/bugs/view.php?id=1320
The problem occures in the ResourceBundleEditor.pageChange(). When we switch to the first page, it'll reload the resource mediator and it'll call edit.resetCache method.