I've uninstalled MalwareBytes because with this defect (and a router whose primary DNS address is IPV6, secondary IPV4), all lookups computer DNS lookups take ages to failover from IPV6 to IPV4, the result is absolutely intolerable.
For me, IPCONFIG /ALL shows:
DNS Servers . . . . . . . . . . . : fda5:7a90:47f9::1
192.168.16.1
fda5:7a90:47f9::1
With MalwareBytes installed, this doesn't work, here I am invoking my router's IPV6 address for resolution:
$ nslookup www.google.com fda5:7a90:47f9::1
Server: UnKnown
Address: fda5:7a90:47f9::1
Non-authoritative answer:
Name: www.google.com
Addresses: 2404:6800:4006:805::2004
142.250.66.196
But with MalwareBytes installed, the IPV4 lookup works fine:
$ nslookup www.google.com 192.168.16.1
Server: openwrt.lan
Address: 192.168.16.1
Non-authoritative answer:
Name: www.google.com
Addresses: 2404:6800:4006:805::2004
216.58.196.132