The recovery alarm cannot display the current value.

[hellobobo9]

What did you do?

What did you expect to see?

What did you see instead? Under which circumstances?

Environment

• System information:

  insert output of uname -srm here

• Prometheus version:

  insert output of prometheus --version here

• Alertmanager version:

  insert output of alertmanager --version here (if relevant to the issue)

• Prometheus configuration file:

insert configuration here

• Alertmanager configuration file:

insert configuration here (if relevant to the issue)

• Logs:

insert Prometheus and Alertmanager logs relevant to t
![qq 20180130132327](https://user-images.githubusercontent.com/35948528/35549945-f4b30e2e-05c2-11e8-8820-f9ee06590672.png)
![qq 20180130132348](https://user-images.githubusercontent.com/35948528/35549946-f4dd31e0-05c2-11e8-8f82-323246b651af.png)
![qq 20180130132352](https://user-images.githubusercontent.com/35948528/35549947-f5084e70-05c2-11e8-93ff-49e5acf5bd17.png)


he issue here

[hellobobo9]

hello

[brian-brazil]

Dupe of #3308

[lock]

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