UNKNOWN in alert emails

[louis-m]

Hi,
does anybody know why I'm getting an UNKNOWN value in our alert emails for icmppingsec?
It's not creating an issue, it just looks a little untidy.

Trigger: TEST (No Response)
Trigger status: PROBLEM
Trigger severity: Warning
Trigger URL:

Item values:

1. Ping Response (TEST:icmppingsec): 0 ms
2. *UNKNOWN* (*UNKNOWN*:*UNKNOWN*): *UNKNOWN*
3. *UNKNOWN* (*UNKNOWN*:*UNKNOWN*): *UNKNOWN*

[BDiE8VNy]

Probably because the expression of the corresponding trigger consists of one item only but the action message references values for a potential 2nd and 3rd item.