When a sign with an event (such as clickEvent, which is the one I had problems with) gets unloaded the event gets deleted.
Comments 4
Sorry Skylinerw, I don't know how to reply with JIRA
Here,
setblock -576 55 1154 wall_sign 4 replace {Text2:"{\"text\":\"\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"setblock -564 54 1149 redstone_block\"}}"}
A sign must contain all 4 Text1/2/3/4 tags, and all 4 must contain a valid JSON object. Example with your command:
setblock -576 55 1154 wall_sign 4 replace {Text1:"[\"\"]",Text2:"{\"text\":\"\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"setblock -564 54 1149 redstone_block\"}}",Text3:"[\"\"]",Text4:"[\"\"]"}
Please provide the command you used to create the sign.