Not connected just to this beta since I'm experiencing this for some time now. Once a week on average, my DDNS stays on old IP instead of changing to new IP after WAN reconnected. It happened today also, but I don't see anything strange in logs. I'm using DuckDNS, so maybe they have some timeouts or? But it is strange that script reports everything ok in logs.
Code:
Jul 7 03:06:43 ddns: update CUSTOM , wan_unit 0
Jul 7 03:06:44 ddns: Clear ddns cache.
Jul 7 03:06:44 custom_script: Running /jffs/scripts/ddns-start (args: xxx.xxx.xxx.xxx)
Jul 7 03:06:49 ddns: Completed custom ddns update