We have a issue the past few days where we have about 50 phones reboot all by themselves.  No rhyme or reason since they are on different switches etc.  Looking at the phone system  i can see that the phones lost connection (   Warning   2022/Jun/24   07:25:48   Heartbeat Server   ICP has lost contact with (172.16.20.27 (08-00-0F-8D-BF-58)) then i see from the inventory that most have a Reg Reason or Failed Over or Forced.   Does this sound like a PBX issue??  Any thoughts or comments are welcome.  Thanks
Perry