Thanks for the report, I'll take a look.

this broke all related jobs for me 

was forced to downgrade to version 1.18.

Same here, just completed the bug report and found this bug report

In case more info is needed you can find it below.

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Environment

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user@sname:~# cat /etc/*release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.3 LTS"
NAME="Ubuntu"
VERSION="16.04.3 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.3 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial

user@sname:~# uname -a
Linux sname 4.4.0-57-generic #78-Ubuntu SMP Fri Dec 9 23:50:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

user@sname:~# dpkg --list | grep -i java
ii  ca-certificates-java             20160321ubuntu1                            all          Common CA certificates (JKS keystore)
ii  default-jre-headless             2:1.8-56ubuntu2                            amd64        Standard Java or Java compatible Runtime (headless)
ii  java-common                      0.56ubuntu2                                all          Base package for Java runtimes
ii  javascript-common                11                                         all          Base support for JavaScript library packages
ii  libjs-openlayers                 2.13.1+ds2-2                               all          JavaScript library for displaying map data in web browsers
ii  openjdk-8-jre:amd64              8u151-b12-0ubuntu0.16.04.2                 amd64        OpenJDK Java runtime, using Hotspot JIT
ii  openjdk-8-jre-headless:amd64     8u151-b12-0ubuntu0.16.04.2                 amd64        OpenJDK Java runtime, using Hotspot JIT (headless)

user@sname:~# dpkg --list | grep -i openj
ii  openjdk-8-jdk:amd64              8u151-b12-0ubuntu0.16.04.2                 amd64        OpenJDK Development Kit (JDK)
ii  openjdk-8-jdk-headless:amd64     8u151-b12-0ubuntu0.16.04.2                 amd64        OpenJDK Development Kit (JDK) (headless)
ii  openjdk-8-jre:amd64              8u151-b12-0ubuntu0.16.04.2                 amd64        OpenJDK Java runtime, using Hotspot JIT
ii  openjdk-8-jre-headless:amd64     8u151-b12-0ubuntu0.16.04.2                 amd64        OpenJDK Java runtime, using Hotspot JIT (headless)

user@sname:~# dpkg --list | grep -i jenkins
ii  jenkins                          2.89.4                                     all          Jenkins is an open source automation server which enables developers around the world to reliably automate  their development lifecycle processes of all kinds, including build, document, test, package, stage, deployment, static analysis and many more.

Jenkins version 2.89.4
Plugin Name: Publish Over SSH
Plugin version: 1.19

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Description

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In a job (Send build artifacts over SSH -> SSH Publishers)

In the Transfers section:
'Remove prefix' or 'Remote directory' are not saved when apply or saved button is pressed.
Tried from multiple browsers and it seems that that is not the problem.
After downgrading the plug-in to version 1.18 the problem was solved.

Also while this change was made on a job the 'Exec timeout (ms)' option was also lost and had to reset it back to 0 (from the 120000 default value). So this may be another parameter that is lost. Others may be affected.

The problem was spot when the Remote directory stopped working.

The weird thing is that only the new jobs are affected. The existing jobs don't have this problem while nobody does any changes to them.

While looking the POST request made by the Jenkins web interface to the backend I saw that the parameters are sent, but the plug-in doesn't seem to read and apply them.

I am having the same problem.  I downgraded to version 1.18, but the SSH section doesn't appear under manage jenkins -> configure system.  Hope this gets fixed soon.

Ok, I'm pretty sure I know what the issue is. I hope to have a release tomorrow.

Code changed in jenkins
User: Alex Earl
Path:
src/main/java/jenkins/plugins/publish_over_ssh/BapSshTransfer.java
http://jenkins-ci.org/commit/publish-over-ssh-plugin/81e80e924bf447dd785af75d2127b7ff207629e8
Log:
Fix JENKINS-49770

Move to previous DataBoundConstructor because of publish-over constraints

Fixed in 1.19.1

Hello! I had the same issue as described in the ticket, after updating to 1.19.1 Remove prefix can be saved.

For your information, all publish-over-ssh component type JENKINS issues related to the Publish Over SSH plugin have been transferred to Github: https://github.com/jenkinsci/publish-over-ssh-plugin/issues

Here is the direct link to this issue in Github: https://github.com/jenkinsci/publish-over-ssh-plugin/issues/109
And here is the link to a search for related issues: https://github.com/jenkinsci/publish-over-ssh-plugin/issues?q=%22JENKINS-49770%22

(Note: this is an automated bulk comment)