GL MT1300 Beryl Timing out? How to prevent

I just upgraded my Beryl MT1300 to this version: 4.3.19 . I have two problems:

  1. Now it seems like the router is timing out and going to 'sleep' after some amount of time. I have this installed in my RV, if I go away for a while (like 2 hours), when I come back it is no longer broadcasting the WIFI networks I had set up. I have to power cycle it to get it working again.
    Is there a setting to prevent this?

  2. In LUCI I can no longer find the custom Firewall rules, to set my TTL . Where di this go, or how do I get it back?
    Thanks!

#1, GL firmware have not WiFi broadcasting 'sleep' schedule. Try to fix the channel, like 36
#2, Probably the latest OpenWRT branch version has replaced the original firewall3 based on iptables with firewall4 based on nftables. The Luci app for firewall settings does not yet support the editing of nftables rules for firewall4, so it simply cannot be displayed. If you need to manually define custom firewall rules now, you can either write system files according to the nftables syntax, or opkg remove firewall4, install firewall and iptables. Refresh LuCI then it's done.

Update:
Hand up over 3 hours, the WiFi and SSID are normal.