it seems that the root reason is that the regenerator module has something wrong. Currently, i can tell that when we reload configuration, then the self.tags in Regenerator is wrong. It does not have anything to clean all previous tags count instead just adding.

        # Linkify tags
        for t in h.tags:
            if t not in self.tags:
                self.tags[t] = 0
            self.tags[t] += 1

this will cause all the tags count number increase every time we reload the configuration.

This will also make WebUI to present some error info.
and some related issues #1597