Reference to null object error in matrix-rubric in preview page because of "paneldynamic"

[PPTA22]

What is the current behavior?

incorrect showing matrix-rubric in preview page because of using "paneldynamic"
just showing a big black circle in the middle of the page

What is the expected behavior?

correctly show the matrix-rubric in the preview page,

How would you reproduce the current behavior (if this is a bug)?

plz find the html file in the attachment(zip file)
test.zip

Specify your

• browser: firefox 84.0.1 / edge(chromium)
• surveyjs version: latest

[andrewtelnov]

@PPTA22 Could you please point to the issue? Here is your example on plunker.

Thank you,
Andrew

[PPTA22]

sorry for the late reply, please also add the preview setting survey.showPreviewBeforeComplete = 'showAnsweredQuestions'; ,
then you would see that the survey preview page is not showing properly

[andrewtelnov]

@PPTA22 I can't reproduce the issue in my example. Could you please fork my example and modify it so it doesn't work or modify your example and make it works.

Thank you,
Andrew

[PPTA22]

try this
https://plnkr.co/edit/4YNL20yJPr1DpVc6

[andrewtelnov]

@PPTA22 It works fine on my side. I have tried it in Chrome, FireFox and IE. Did you apply your changes in this plunker?

Thank you,
Andrew

[PPTA22]

In my firefox, Edge both have this issue, the only thing i added on your plunker is
survey.showPreviewBeforeComplete = 'showAnsweredQuestions';

this problem not only happened in one computer, i was using my office computer, then now I am using my own computer,
both of them have this issue

[andrewtelnov]

@PPTA22 I did not click on "Preview" button. Got it now.

Thank you,
Andrew

[PPTA22]

Thank you 👍

[andrewtelnov]

@PPTA22 The bug is fixed by the commit above. We will include the fix in v1.8.24.

Thank you,
Andrew

[PPTA22]

Thank you so much 👍