DB Engine :: Logon Failed For Login Due To Trigger Execution

I have a logon trigger on a SQL Server 2008 R2 Express Advanced production database to prevent remote logons. The trigger works fine. When I need to connect via my local machine, remotely, I connect via a VPN, can connect with SSMS and do whatever I need. However, if I use a linked server on my local machine (still connected via VPN), I receive the logon error

Msg 17892, Level 14, State 1, Line 1
Logon failed for login 'sa' due to trigger execution.

The trigger is below and it logs any failures, except for the linked server.

If I disable the trigger, the linked server connects ok.

CREATE TRIGGER [tr_MasterLogon]
   ON  ALL SERVER  WITH EXECUTE AS 'sa'
   FOR LOGON
AS
BEGIN
 DECLARE
  @ClientAddress varchar(48) = (SELECT client_net_address

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