When doing a /blockdata on signs, the open_url clickEvent action is broken

Problem
When I try to update the blockdata of a sign using this code:

/blockdata ~ ~1 ~ {Text1:"{\"text\":\"Test\",\"open_url\":{\"action\":\"run_command\",\"value\":\"https://www.google.com/\"}}"}

it gives me no error but refuses to let me open the link, there isn't even a prompt. Amazingly, the run_command action still works.

Replication
Update a sign's blockdata via /blockdata and add the click event "open_url" to some text followed by a website URL as the value. There is example code above.