Query mode TEXT returns no data for Last Value

[Positronico]

Describe the bug
A query mode Text doesn't return the Last Value. When used in a Stat panel formatted as table, it shows No Data. When used in a Table panel formatted as a table, the Last Value is empty. Formatted as a Time Series, the time column for the collected data is correct, but the value column is empty.

Expected behavior
It was working as a Stat "legacy" mode, showing the last collected value and also as in table mode, on Grafana 7.1.5. Problem started after 7.2.0 update.

Screenshots

Network data

{"result":[{"clock":"1601074858","itemid":"34820","ns":"752173290","value":"x.x.x.x"},
{"clock":"1601074923","itemid":"34820","ns":"874368151","value":"x.x.x.x"},
{"clock":"1601074988","itemid":"34820","ns":"524686158","value":"x.x.x.x"},
(...)
{"clock":"1601096419","itemid":"34820","ns":"485776228","value":"x.x.x.x"}]}

Software versions

| Grafana | Zabbix | Grafana-Zabbix Plugin |
| ------- | ------ | --------------------- |
| 7.2.0   | 4.4.10 | 4.0.1                 |

[AhmadNourXV]

I'm having this issue as well. I reverted to 7.1.5 and the issue is fixed.

[roman-tiukh]

I have the same

[bastun-del]

I have the same problem with guarana 7.2.0 and Zabbix-server 5.0

[borjasueiro]

I have the same issue.

• Grafana 7.2.0
• Plugin 4.0.1
• Zabbix 5.0.4

[adrianomazi]

I have the same issue.

• Grafana 7.2.0
• Plugin 4.0.1
• Zabbix 5.0.4

[alexanderzobnin]

There's an issue in grafana repo: grafana/grafana#28042

[isaqueprofeta]

I have the same issue.

• Grafana 7.2.1
• Plugin 4.0.1
• Zabbix 4.4.10

[Positronico]

I think we have to reopen this one.

Ref.: grafana/grafana#27971

[alexanderzobnin]

I'm working on switching to the Data Frame format, so I think it should fix this issue.

[alexanderzobnin]

Ah, sorry. That's probably a replace variables issue. Could you try to set .* value to the text filter field? If it works in this case, then issue is fixed in 6c20b07 and will be released soon.

[cawhite6]

I can confirm the catch-all (.*) in filter populated the string value.....

[alexanderzobnin]

Ok, that means bug is on the plugin side and fix will be included in the next release.

[alexanderzobnin]

Fixed in 6c20b07