i have an issue with one writeback tag and i tried below steps in my troubleshooting
1. deleted tag and recreated with same configuration. but not scuceed
2. changed source tag with working writeback tag(writeback tag is not getting snapshot value)but instrument tag is getting latest value.
3. added pointid of source tag in userint1 of writebhack tag
4. restarted interface whether it may be an problematic