PnP Search Results Not Appearing on Initial Page Load

[lindseyn86]

Version used
Ex: 4.13.1 (but also 4.9.13)

Describe the bug
When loading pages that use PnP search results webparts, the search results are not displaying. This happens randomly. The contents of the search results PnP webpart doesn't load. I have attached screenshots from dev tools that show the network and console tabs upon page load when the issue is happening.

To Reproduce
We have been unable to reproduce the issue on a consistent basis. This just happens randomly on page load and we don't actually do anything to produce the issue.

Expected behavior
The PNP Search results appear within the webpart.

Screenshots
Image 1 - search results for events are not displaying

Image 2 - Shows a blank webpart, but no console issues:

Image 3 - this one shows where it failed to get the html templates, but this isn't always the case when the web part shows blank AND it shows blank on a page without an html template

Image 4 - Random localhost request:

Image 5 - this request DOES get results when it shows a blank PnP web part

Image 6 - screenshot where entire body of page doesn't load, with a bunch of errors from OOTB sp-pages-assembly js:

Desktop (please complete the following information):
Google Chrome and Microsoft Edge
Not using a VPN

Additional context
This can only be replicated on the client's laptops.