This happens since updating some plugins today (27.02.2023).
I have a feeling that it might be related to JENKINS-70528 (just a guess).

For testing I used following pipeline snippled (the job's name is "work_ServerCheck"):

def exwsAll = exwsAllocate diskPoolId: 'ArchivedBuilds', path: "unmerged/work_ServerCheck"
exws  (exwsAll) {
    exwsPath=   pwd()    
    println "exwsPath="+exwsPath{}
    sh 'pwd'
}

This produces following output (I marked unexpected values red - they used to be equal to the green value in previous versions):
10:02:42  Running in /media/Builds/unmerged/work_ServerCheck
10:02:42  [Pipeline] {
10:02:42  [Pipeline] pwd
10:02:42  [Pipeline] echo
10:02:42  exwsPath=/rsync/JenkinsJobs/workspace/work_ServerCheck
10:02:42  [Pipeline] sh
10:02:42  + pwd
10:02:42  /rsync/JenkinsJobs/workspace/work_ServerCheck
10:02:42  [Pipeline] } 
10:02:42  [Pipeline] // exws
10:02:42  [Pipeline] echo