Custom all value does not replace variable interpolation

[franciscocpg]

What Grafana version are you using?

Grafana v5.2.1 (2040f61)

What datasource are you using?

Cloudwatch

What OS are you running grafana on?

Linux

What did you do?

I'm using the value of a variable (A) as Custom all value in another query variable (B) with Include All Option enabled. So the Custom all value field of variable B is: $A.

What was the expected result?

I expected the value of All in query variable B to be replaced by the value of the variable A.

What happened instead?

The value of All in query variable B is not replaced by the value of the variable A and its raw value ($A) is used instead.

If related to metric query / data viz:

n/a

Include raw network request & response: get by opening Chrome Dev Tools (F12, Ctrl+Shift+I on windows, Cmd+Opt+I on Mac), go the network tab.

n/a