Just flashed 386.2.2 Working good, as stated ICMPv6 is now back to the way it should be. Thank You @RMerlin.
Just seen this anything to be concerned about ?
DNS Vulnerabilities Expose Millions of ... (darkreading.com)
From that article:
The four stacks in which the vulnerabilities exist are FreeBSD, Nucleus NET, NetX, and IPnet.
Asuswrt-Merlin runs on Linux.