In addition to the mentioned warning in the browser console, it looks like the click event on .node-name is fired twice when clicked.
This toggles activation/deactivation on the log entry twice, effectively returning to the initial state. See ui/src/main/js/view/stage-logs.js:

[...]
var nodeNameBars = $('.node-name', stageLogsDom);
[...]

nodeNameBars.click(function() {
  // this handler is getting called twice per click for me
});

Maybe it helps to extract the registration of the click-handler from dialog.show(onshow())?

the build history widget does not update…

Filed separately as JENKINS-33589.

svanoort Are you still working on this?

If not:
hrmpw WDYT? Looks like a pretty popular issue.

danielbeck Yes, I am aware, it has been root caused and should be a small, easy fix that can be implemented once the most critical of the scalability enhancements in https://issues.jenkins-ci.org/browse/JENKINS-33624 is ready for release inclusion, since it is more complex (harder to return to after a context-switch). This & that will be the final items before we cut a pipeline stage view release.

I believe that amuniz volunteered to work on this now since he has capacity right now and is free to dump context.

PR sent: https://github.com/jenkinsci/pipeline-stage-view-plugin/pull/5

Code changed in jenkins
User: Antonio Muñiz
Path:
ui/src/main/js/view/stage-logs.js
http://jenkins-ci.org/commit/pipeline-stage-view-plugin/f5a7cdbc25d1bba84eb8aa6b1b448dc589e42ea7
Log:
JENKINS-33110 Fixed regression in stage logs dialog + log sections not expanded right when there are more than 15-20 steps in the same stage

Code changed in jenkins
User: Antonio Muñiz
Path:
ui/src/main/js/view/templates/stage-logs.less
http://jenkins-ci.org/commit/pipeline-stage-view-plugin/6a4c14878b1a6bfd320169eaf6e254164affea9a
Log:
JENKINS-33110 Every log section have a maximum height (which forces scroll)

Code changed in jenkins
User: Antonio Muñiz
Path:
ui/src/test/js/view/stage-logs-spec.js
http://jenkins-ci.org/commit/pipeline-stage-view-plugin/91497d51b17ad079f35a8e75fcc92719724a33ab
Log:
JENKINS-33110 Test it

Code changed in jenkins
User: Sam Van Oort
Path:
ui/src/main/js/view/stage-logs.js
ui/src/main/js/view/templates/stage-logs.hbs
ui/src/main/js/view/templates/stage-logs.less
ui/src/test/js/view/stage-logs-spec.js
http://jenkins-ci.org/commit/pipeline-stage-view-plugin/44ef3e5bbd4e61033b9c0847d8ef6ec1b02624e7
Log:
Merge pull request #5 from amuniz/JENKINS-33110

JENKINS-33110 Log details not shown

Compare: https://github.com/jenkinsci/pipeline-stage-view-plugin/compare/e99d804ebbe4...44ef3e5bbd4e

released and verified.