SonarQube caching not working on Azure DevOps pipelines

SonarQube Server / Community Build
1

I’ve been running the Azure DevOps plugins for SonarQube server (Community build v24.12.0.100206) with quite a bit of success; however, when I try to enable caching of the SonarQube tasks to improve performance of the pipeline according to the published instructions, then the build fails at the post-cache execution.

I’ve configured the .NET scanner as follows:

- task: Cache@2
  inputs:
    key: '"SonarScanner" | ".NET" | "$(Agent.OS)"'
    path: '$(Agent.ToolsDirectory)/SonarScanner .NET'
- task: SonarQubePrepare@7
  inputs:
    SonarQube: 'SonarQube'
    scannerMode: 'dotnet'
    projectKey: '${{parameters.sonarProjectKey}}'
    projectVersion: '${{parameters.version}}'
# builds and tests go in here
- task: SonarQubeAnalyze@7
- task: SonarQubePublish@7
  inputs:
    pollingTimeoutSec: '300'

The Cache step produces the following output with no issue:

Starting: Cache SonarScanner
==============================================================================
Task         : Cache
Description  : Cache files between runs
Version      : 2.198.0
Author       : Microsoft Corporation
Help         : https://aka.ms/pipeline-caching-docs
==============================================================================
Resolving key:
 - "SonarScanner" [string]
 - ".NET"         [string]
 - "Windows_NT"   [string]
Resolved to: "SonarScanner"|".NET"|"Windows_NT"
Using default max parallelism.
Max dedup parallelism: 192
DomainId: 0
ApplicationInsightsTelemetrySender will correlate events with X-TFS-Session b45e5e3d-e2cc-4b2e-aa14-8d7920950242
Hashtype: Dedup64K
Getting a pipeline cache artifact with one of the following fingerprints:
Fingerprint: `"SonarScanner"|".NET"|"Windows_NT"`
There is a cache miss.
ApplicationInsightsTelemetrySender correlated 1 events with X-TFS-Session b45e5e3d-e2cc-4b2e-aa14-8d7920950242
Finishing: Cache SonarScanner

and all the other steps run without problem, until the Post-Job:Cache step:

Starting: Cache SonarScanner
==============================================================================
Task         : Cache
Description  : Cache files between runs
Version      : 2.198.0
Author       : Microsoft Corporation
Help         : https://aka.ms/pipeline-caching-docs
==============================================================================
Resolving key:
 - "SonarScanner" [string]
 - ".NET"         [string]
 - "Windows_NT"   [string]
Resolved to: "SonarScanner"|".NET"|"Windows_NT"
Using default max parallelism.
Max dedup parallelism: 192
DomainId: 0
ApplicationInsightsTelemetrySender will correlate events with X-TFS-Session 4145e2aa-a339-48af-9c86-698ef0d608e9
Hashtype: Dedup64K
Getting a pipeline cache artifact with one of the following fingerprints:
Fingerprint: `"SonarScanner"|".NET"|"Windows_NT"`
There is a cache miss.
tar: could not chdir to 'C:\hostedtoolcache\windows\SonarScanner .NET'

ApplicationInsightsTelemetrySender correlated 1 events with X-TFS-Session 4145e2aa-a339-48af-9c86-698ef0d608e9
##[error]Process returned non-zero exit code: 1
Finishing: Cache SonarScanner

which results in the pipeline being marked as failed (despite everything working, all my analysis results are published to SonarQube correctly).

If I remove the Cache task then the pipeline executes to completion successfully, and I’m doing what’s in the documentation - is there some extra configuration of the Cache task that I’m missing?