Document Library Webpart on Modern Webpage not loading correctly

[John Seto]

As you can see in the image below, when you expand the category it should display a list of documents. When you click Section 1 or 2, it goes to the document library but nothing is displayed. The issue is intermittent. We tried this on multiple browsers on a Windows PC and also multiple browsers on OSX. Same result. The only way to get rid of this, is remove the webpart and put it back on the page. Problem is it reappears. 

[#2]

Unfortunately we cannot help here a lot...some things to try:
(1) Access to the page on an InPrivate session to see if the issue is solved
(2) If (1) does not work, open a support ticket

[#3]

John...how many items are in the list and are there previous grouping, like subsection 1.0 etc, that have been populated and with how many items.  I've seen it where all the items are not loaded but you should see a "Expand" (or something similar) that will show you the balance of the items for that grouping.  

[#4]

There are around 600 items. And there are 5 main sections. With

example of the layout

Section 1: XYZ

- Sub Section: 1.1

- Sub Section: 1.2

- Sub Section: 1.3

Section 2: ABC

- Sub Section: 2.1

- Sub Section: 2.2

[#5]

Same on In Private mode and yes a support ticket is being opened.