RBR50 intermittent DNS lookup issues

Model: RBK50v2
Firmware: 2.7.2.104

I've been experiencing the same issue as OP starting immediately after the recent time change. Adding a root cronjob that restarts the dnsmasq service every hour has significantly reduced the occurrence of the symptom. I just got done bumping the cron job up to run every 30 minutes. The NTP config change sounds appealing and easy to apply and revert. I will likely give that a shot if the symptom appears again. I reached out to a Netgear admin and moderator via DM to provide my assistance in troubleshooting if necessary. My hope is that they can develop a fix and release a firmware update soon. My next fallback is Voxel's custom RBK50 firmware since the issue has not been reported using it. If all else fails, I'll return my RBK50 to Costco thanks to their liberal return policy.

As previously linked, I found the information available at https://community.netgear.com/t5/Orbi/Orbi-DNS-and-DHCP-and-NTP-Broken-Short-Term-Fix-Options/m-p/2071273/thread-id/116734 the most helpful.