Fedora 34 dns resolution problems?

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I'm not even sure what to file a bug against.  This makes no sense to
me.

I have four Raspberry Pi's on Fedora 34.  One RPi4 and Three RPi3s, all
running aarch 64.  I also have numerous other RPi's on Fedora 33
aarch64 that are running just fine, parallel configurations.  I'm not
upgrading any of my X86_64 systems until I know the root cause of this.

If the Fedora 34 systems are up more than a day and I go to update I
get things like this...

-- 
rror: Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64 [Could not resolve host: mirrors.fedoraproject.org] (https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64).
error: Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64 [Could not resolve host: mirrors.fedoraproject.org] (https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64).
error: Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64 [Could not resolve host: mirrors.fedoraproject.org] (https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64).
error: Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64 [Could not resolve host: mirrors.fedoraproject.org] (https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64).
error: Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64 [Could not resolve host: mirrors.fedoraproject.org] (https://mirrors.fedoraproject.org/metalink?repo=fedora-modular-33&arch=aarch64).
-- 

And this...

-- 
[mhw@rpi-plate ~]$ host mirrors.fedoraproject.org
mirrors.fedoraproject.org is an alias for wildcard.fedoraproject.org.
wildcard.fedoraproject.org has address 152.19.134.198
wildcard.fedoraproject.org has address 8.43.85.67
wildcard.fedoraproject.org has address 209.132.190.2
wildcard.fedoraproject.org has address 152.19.134.142
wildcard.fedoraproject.org has address 140.211.169.206
wildcard.fedoraproject.org has address 8.43.85.73
wildcard.fedoraproject.org has address 38.145.60.20
wildcard.fedoraproject.org has address 38.145.60.21
wildcard.fedoraproject.org has address 140.211.169.196
wildcard.fedoraproject.org has address 67.219.144.68
wildcard.fedoraproject.org has IPv6 address 2620:52:3:1:dead:beef:cafe:fed6
wildcard.fedoraproject.org has IPv6 address 2604:1580:fe00:0:dead:beef:cafe:fed1
wildcard.fedoraproject.org has IPv6 address 2605:bc80:3010:600:dead:beef:cafe:fed9
wildcard.fedoraproject.org has IPv6 address 2620:52:3:1:dead:beef:cafe:fed7
wildcard.fedoraproject.org has IPv6 address 2610:28:3090:3001:dead:beef:cafe:fed3
wildcard.fedoraproject.org has IPv6 address 2605:bc80:3010:600:dead:beef:cafe:feda
[mhw@rpi-plate ~]$ ping mirrors.fedoraproject.org
ping: mirrors.fedoraproject.org: Name or service not known
[mhw@rpi-plate ~]$ ping6 mirrors.fedoraproject.org
ping6: mirrors.fedoraproject.org: Name or service not known

-- 

Checking /etc/resolv.conf looks good (host works) and nsswitch.conf
looks good.  Doesn't seem to depend on whether I use static name
servers or dhcp served name servers (I have some of each on both the
Fedora 34 and the Fedora 33).  All on the same network.  All with the
same name servers for resolution.

/etc/resolv.conf
-- 
# Generated by NetworkManager
search wittsend.com
nameserver 8.8.8.8
nameserver 1.1.1.1
nameserver 10.205.38.3
-- 

Restarting NetworkManager - no help

Rebooting the system restores normal operation for anywhere from
several hours to a day before it happens again.

WTH changed between 33 and 34 to create this problem?  Anybody got any
suggestions where to look?  None, I mean not a single solitary one of
my Fedora 33 systems, x86_64, arm7l (RPi 2's), or aarch64's are
behaving this way but all 4 of my Fedora 34 systems are.

Regards,
Mike
-- 
Michael H. Warfield (AI4NB) | (o) +1 706 850-8773 |  mhw@xxxxxxxxxxxx
   /\/\|=mhw=|\/\/          | (c) +1 678 463-0932 |  http://www.wittsend.com/mhw/
ARIN whois: MHW9-ARIN       | An optimist believes we live in the best of all
PGP Key: 0xC0EB9675674627FF | possible worlds.  A pessimist is sure of it!

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