I thought my router was on the latest firmware but I checked it out today and found a newer version! More interestingly, there is something in the release note... Will give it a try
Modifications in V5.13(AAVF.13)b2
[BUG FIX]
1. [GUI] The ip alias will become empty when press apply button.
2. [WAN][IPv6] Connection might fail with multiple DHCPv6 clients.
3. [WAN] ADSL would be re-train if add one connection rule.
4. [System] 3G signal is always lighting in System Info.
5. [WAN] Idle for a while, LAN PC sometimes can't surf website.6. [GUI] On card page, add a new parental control rule, then modify
but time show blank.