Panic `fatal error: concurrent map read and map write` under heavy load

[michalpristas]

Under heavy load we can run into panic fatal error: concurrent map read and map write in RemoteOutputConfigChanged

It's not frequent but worth fixing

[michel-laterman]

@michalpristas do you know if this issue occurred before or after #4776 was merged?

[michalpristas]

it was before: 373a9d2
8.17.3 release

closing as from what i see PR you linked fixed the issue