Extension apex language server raised problems do not populate Source

[nwcm]

Summary

When a apex language server raises a problem with a file it does not populate the issue / diagnositic source. Making it hard to identify.

https://code.visualstudio.com/api/references/vscode-api#Diagnostic

this relates to salesforcedx-vscode-apex.enable-semantic-errors

Steps To Reproduce:

1. create apex class that has a LS issue. e.g. reference a non-existing method.
2. See in problems tab no source is populated

Expected result

Source is populated with Apex-LS or similar

Actual result

Project Info:

Run SFDX: Generate Project Info from the command palette and paste the contents of .sf/project-info.md below.

Project Info

Generated: 2026-07-29T04:13:11.676Z

Metadata

sourceApiVersion: 66.0
packageDirectories: 7
namespace: ns

Types

Type	Components	Files	Size (KB)
ApexClass	2088	6264	34500
ApexPage	7	21	51
ApexTestSuite	13	13	27
ApexTrigger	59	177	38
AuraDefinitionBundle	195	1178	1018
BusinessProcess	4	4	1
CompactLayout	16	16	5
ContentAsset	3	9	90
CustomApplication	3	3	38
CustomField	908	908	671
CustomLabels	5	5	412
CustomMetadata	504	504	551
CustomNotificationType	2	2	1
CustomObject	309	5202	6866
CustomPageWebLink	1	1	1
CustomPermission	36	36	9
CustomTab	62	62	12
DataWeaveResource	1	3	3
DuplicateRule	1	1	1
ExternalClientApplication	4	4	3
ExternalCredential	1	1	1
ExtlClntAppConfigurablePolicies	1	1	0
ExtlClntAppOauthConfigurablePolicies	1	1	1
ExtlClntAppOauthSettings	4	4	2
FieldSet	54	54	89
FlexiPage	93	93	1819
Flow	11	11	130
GlobalValueSet	11	11	17
InvocableActionExtension	2	2	23
Layout	332	332	1874
LightningComponentBundle	627	2964	7570
LightningMessageChannel	3	3	2
ListView	14	14	6
MatchingRules	1	1	1
NamedCredential	1	1	1
NotificationTypeConfig	1	1	0
PathAssistant	8	8	3
PermissionSet	59	59	2091
PlatformCachePartition	1	1	1
Profile	1	1	65
QuickAction	74	74	86
RecordType	161	161	1971
RemoteSiteSetting	3	3	1
Report	27	27	57
ReportFolder	7	7	1
ReportType	10	10	163
Settings	1	1	0
StandardValueSet	10	10	40
StaticResource	32	2934	29657
ValidationRule	43	43	27
WebLink	2	2	1

Org

Key	Value
Org type	scratch
Source tracking	true
SourceMember count	14382

Settings

Setting	Value
salesforcedx-vscode-metadata.showSuccessNotification	true
salesforcedx-vscode-metadata.sourceTracking.pollingIntervalSeconds	0
salesforcedx-vscode-core.push-or-deploy-on-save.enabled	false
salesforcedx-vscode-core.push-or-deploy-on-save.ignoreConflictsOnPush	true
salesforcedx-vscode-core.detectConflictsForDeployAndRetrieve	false
salesforcedx-vscode-core.clearOutputTab	false
salesforcedx-vscode-core.show-cli-success-msg	true
salesforcedx-vscode-core.telemetry.enabled	false
salesforcedx-vscode-core.enable-sobject-refresh-on-startup	false
salesforcedx-vscode-core.telemetry-tag
salesforcedx-vscode-salesforcedx.enableLocalTraces	false
salesforcedx-vscode-salesforcedx.enableConsoleTraces	false
salesforcedx-vscode-salesforcedx.enableFileTraces	false
salesforcedx-vscode-apex.java.home

Environment

Key	Value
Salesforce CLI	@salesforce/cli/2.144.6 win32-x64 node-v24.18.0
Java	openjdk 25.0.4 2026-07-21 LTS
Editor	Kiro
VS Code	1.107.1
Node	v22.22.0
OS	Windows_NT 10.0.26200

Extensions (Salesforce)

Extension	Version
salesforce.apex-language-server-extension	0.8.0
salesforce.salesforce-vscode-slds	1.4.8
salesforce.salesforcedx-vscode	67.7.1
salesforce.salesforcedx-vscode-apex	67.7.1
salesforce.salesforcedx-vscode-apex-debugger	67.7.1
salesforce.salesforcedx-vscode-apex-log	67.7.1
salesforce.salesforcedx-vscode-apex-testing	67.7.1
salesforce.salesforcedx-vscode-core	67.7.1
salesforce.salesforcedx-vscode-expanded	67.7.1
salesforce.salesforcedx-vscode-lightning	67.7.1
salesforce.salesforcedx-vscode-lwc	67.7.1
salesforce.salesforcedx-vscode-metadata	67.7.1
salesforce.salesforcedx-vscode-org	67.7.1
salesforce.salesforcedx-vscode-services	67.7.1
salesforce.salesforcedx-vscode-soql	67.7.1
salesforce.salesforcedx-vscode-ui-preview	1.3.0
salesforce.salesforcedx-vscode-visualforce	67.7.1

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