Unable to reproduce the issue on windows 10 using chrome reported version -69.0.3497.81 & canary-71.0.3550.0 as per steps in C#0.Empty network  page is displayed once we drag saved HAR file to network tab.

Please find the attached screencast for reference & let us know if we miss any steps to reproduce the issue from our end.
Thanks.!

Deleted: 881327-Win.mp4 4.4 MB

	881327-Win.mp4 4.4 MB View Download

Thanks for looking into this. Your reproduction steps are correct but I think `chrome://version` must be a special case of some sort, as I've tried it and the HAR file is almost empty. I would suggest trying to replicate on a normal webpage. This is one I happened to notice makes several XHRs - https://www.w3schools.com/xml/xml_http.asp. I've attached a screen recording in case it helps - as you can see, there are numerous XHRs but when the HAR is loaded it appears that there were none. I assume this is because they are being saved/loaded back as the wrong content type. (In my original screenshot, you can see they were available in the JS section, rather than the XHR section.)

Deleted: 881327 repro steps.mp4 2.9 MB

	881327 repro steps.mp4 2.9 MB View Download

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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7e6c3233fc2f2eeb738aba352c360020dd40b9f3

commit 7e6c3233fc2f2eeb738aba352c360020dd40b9f3
Author: Joey Arhar <jarhar@chromium.org>
Date: Wed Nov 28 01:57:06 2018

[DevTools] Add ResourceType to HAR exports

Bug:  881327 
Change-Id: I7e9f50f598210e75d613561855dd4bde95ebaa0f
Reviewed-on: https://chromium-review.googlesource.com/c/1342761
Commit-Queue: Joey Arhar <jarhar@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611505}
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/renderer/devtools/front_end/common/ResourceType.js
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/renderer/devtools/front_end/har_importer/HARFormat.js
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/renderer/devtools/front_end/har_importer/HARImporter.js
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/renderer/devtools/front_end/sdk/HARLog.js
[add] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/web_tests/http/tests/devtools/har-importer-expected.txt
[add] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/web_tests/http/tests/devtools/har-importer.js
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/web_tests/http/tests/devtools/resource-har-conversion-expected.txt
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/web_tests/http/tests/devtools/resource-har-headers-expected.txt
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/web_tests/http/tests/devtools/resource-har-headers.js
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/web_tests/http/tests/devtools/resource-parameters-expected.txt
[modify] https://crrev.com/7e6c3233fc2f2eeb738aba352c360020dd40b9f3/third_party/blink/web_tests/http/tests/devtools/resource-parameters-ipv6-expected.txt

HAR exports will now contain extra information to include the type, so when you import a new one the correct type will be shown. The change is not in canary yet but it will be soon.