Serviio not refreshing content on TV

Hi team,
i ve been using Serviio for several years now with no issue.
Recently, I am experiencing problem with content refresh on TV. I tried to troubleshoot and here is what i tried so far and didn't work:
- uninstal/reinstal of latest serviio version
- firewall on/off
- tv reset
- router reset
- serviio force refresh

Serviio settings:
- serviio library is set on auto refresh
- "Use the poller mechanism for monitoring this folder" is enabled

Content is shared from PC on private LAN to LG LG 55UN81003LB.
No settings have been change on router.
OS: Windows Home 64 with regular automatic updates

Any idea what else I can try?

Update:
I just got a refresh on TV on shared content after these steps:
Open console -> Library -> Shared folders -> "Edit" on shared folder -> "OK" -> "Save" -> Restart PC