I have a fairly simple pipeline that looks like this:

pipeline {
    tools {
        msbuild 'MSBuild 2022'
    }
    
    stages {
        stage("Checkout") {
            steps {
                 customCheckoutStep()
            }
        }
        
        stage('build') {
            steps {
               bat 'msbuild -Restore'
            }
        }
    }
}

When the pipeline runs, it appears that msbuild gets downloaded and installed multiple times, seemingly once for each stage (+ the "tool install" stage)

See the attached (sanitized) log.

It doesn't break the build, but it does increase the build time quite a bit.