Ignition no tag value changed event

Hi ,

I wrote code to change some tag values periodically via ignition SDK API, I also put value changed event to insert record to database. But strangely, sometimes, it runs perfect. occasionally, value changed events are never triggered. From the log, I can confirm my script indeed wrote all the tags. However when I open the script editor and click save again (needn’t modify anything). The event can be triggered after then. Is it a ignition bug or something?