Thank you. It seems to me that http://coinig.com has a problem validating vanity addresses or something 
No. It just can't verify signed messages with line break. But a lot of people love to use them for whatever reason
Message has be resigned without a line break.
Code:
----BEGIN BITCOIN SIGNED MESSAGE----
This is bitcointalk.org member: idev Todays Date: 18/06/2016
----BEGIN SIGNATURE----
Address: 1idev1vktD8RXs8KHmQqNNmB2TGBCUkSb
Signature: HAKLKbOoq21oxB8vj3dGltZlTd+RkKK9FeKMnn35kDJEaodxGxsy1CE7X5bXu2H8MNBQOpFZ1eqdAHKbJzYSbqU=
----END BITCOIN SIGNED MESSAGE----
Now verifiable on coinig.comThis is bitcointalk.org member: idev Todays Date: 18/06/2016
----BEGIN SIGNATURE----
Address: 1idev1vktD8RXs8KHmQqNNmB2TGBCUkSb
Signature: HAKLKbOoq21oxB8vj3dGltZlTd+RkKK9FeKMnn35kDJEaodxGxsy1CE7X5bXu2H8MNBQOpFZ1eqdAHKbJzYSbqU=
----END BITCOIN SIGNED MESSAGE----
I've recently got my account back but I'm not 100% confidant if the address above has not been compromised or not due to being on a computer which was infected.
So I'm staking a new address on a new computer from a new bitcoin wallet installation.
Code:
----BEGIN BITCOIN SIGNED MESSAGE----
This is bitcointalk.org member: idev Todays Date: 09/07/2020
----BEGIN SIGNATURE----
Address: 1GoLazRNHNLMi4rNHTPmCPN4qPTSnZ5Z31
Signature: Hz58ziLOt00tIpKMLrKbuRlqrSheOXaE+9fsrOnxyTtBb1tS4IP1Fr+s0PAHLEqLJF1l1Sigu/ZNN0+TIoELQzU=
----END BITCOIN SIGNED MESSAGE----
This is bitcointalk.org member: idev Todays Date: 09/07/2020
----BEGIN SIGNATURE----
Address: 1GoLazRNHNLMi4rNHTPmCPN4qPTSnZ5Z31
Signature: Hz58ziLOt00tIpKMLrKbuRlqrSheOXaE+9fsrOnxyTtBb1tS4IP1Fr+s0PAHLEqLJF1l1Sigu/ZNN0+TIoELQzU=
----END BITCOIN SIGNED MESSAGE----
Quoted,