A new install generates parse error

[maggie44]

Describe the bug

I had been using this chart perfectly before. I just started up a new cluster, and added the chart again, so presumably using the one since the recent fixes last week. And now seeing this error:

Do you think it is related? An issue with the parsing of the \ it seems, that appears to have been added.

In the browser console:

runRequest.catchError
Object

config: {method: "GET", hideFromInspector: true, url: "api/datasources/uid/aej84iwob198gc/resources/api/v…%5D%2B)%3F)%22%7D&start=1745064581&end=1745068181", headers: {X-Grafana-Org-Id: 1, X-Grafana-Device-Id: "3a0de2f6b008324884d99de2a97b4fad"}, retry: 0}

data: {status: "error", errorType: "bad_data", error: "1:27: parse error: unknown escape sequence U+002E '.'", message: "1:27: parse error: unknown escape sequence U+002E '.'"}

message: "1:27: parse error: unknown escape sequence U+002E '.'"

status: 400

statusText: ""

traceId: undefined

SceneVariableSet updateAndValidate error
Object

config: {method: "GET", hideFromInspector: true, url: "api/datasources/uid/aej84iwob198gc/resources/api/v…%5D%2B)%3F)%22%7D&start=1745064581&end=1745068181", headers: {X-Grafana-Org-Id: 1, X-Grafana-Device-Id: "3a0de2f6b008324884d99de2a97b4fad"}, retry: 0}

data: {status: "error", errorType: "bad_data", error: "1:27: parse error: unknown escape sequence U+002E '.'", message: "1:27: parse error: unknown escape sequence U+002E '.'"}

message: "1:27: parse error: unknown escape sequence U+002E '.'"

status: 400

statusText: ""

traceId: undefined

### How to reproduce?

repoURL: https://grafana.github.io/helm-charts
targetRevision: 8.12.1

### Expected behavior

No error messages. 

### Additional context

_No response_

[maggie44]

Specifically on k8s-views-nodes.json

Revision: 2024-10-03T20:28:57

Revision: 2025-03-12T21:36:58

[aroca-opengov]

Yes. Same error with that dashboard for me too.

[parsa-asgari]

Yes. Same error.

[stefan-shredder]

Yes. Same error here. Looks like when you take out the two escape characters \\ before the dot from the below query, the issue is resolved.

"query": "label_values(node_uname_info{nodename=~\"(?i:($node)(\\.[a-z0-9.]+)?)\"}, instance)",

change it to:

"query": "label_values(node_uname_info{nodename=~\"(?i:($node)(.[a-z0-9.]+)?)\"}, instance)",