Please read release notes and read down through the current firmware bug reports before reporting the same issue over again
viewtopic.php?f=17&t=1806&start=10#p13655v1.4.2 wrote:FIXED
- Fixed SFP Stats for WS-10-250-AC
- Fixed Disabling Discovery Tab in the UI so it actually disables the service
- Fixed HIGH CPU utilization wen Discovery Tab was enabled
- Fixed port watt usage on the WS-8-150-DC
- Fix null switch name in emails
- Fix problem with ubnt discovery interfering with STP (we think this is fixed waiting on feed back)
- Fix for IGMP Snooping with VLANs (we think this is fixed waiting on feed back)
ENHANCEMENTS
- Added option to disable IGMP querier per VLAN if IGMP snooping is enabled
- Increased the acceptable voltage ranges to prevent false alerts
- Tweaked Pause Frame Storm Protection
KNOWN ISSUES
- Some language templates need help - please contact us to help
- Clearing Stats on SFP ports singly is broken on some models - Known broken on WS-10-250-AC and WS-12-250-XX
Released 6/15/2016
Also your post would provide little information to verify your issue if it was not already known.
Always report things like MODEL, FIRMWARE VERSION
If you report an older version than the latest firmware version the answer will be "Please first upgrade to the latest version and see if the problem is still there"