[BUG] Web page saved as "HTML file with images" got corrupted

[JJ]

Tested Opera versions:
- Opera for Windows v11.64 build 1403
- Opera for Windows v12.02 build 1578

Tested URL:
https://developer.mozilla.org/en-US/docs/DOM_Client_Object_Cross-
Reference/style

Steps to reproduce:
1. Open above URL (assume as Tab-B).
2. Save it as "HTML file with images" type with any name.
3. Open the saved HTML file as a new tab (Tab-B).
4. Switch to Tab-A, then scroll to page bottom.
5. Switch to Tab-B, then scroll to page bottom.

Expected result:
At least the page is visually identical.

Actual result:
The page is not visually identical. The page layout got broken in Tab-B,
the saved page. The difference starts near the 3rd occurence of
"paddingTop" text, after the "</td>" HTML tag, where "</tr>" is expected,
but "<!--/tr-->" is found instead. The corrupted data seems to be
replaced with previous data.

Additional info:
This seems to affect all pages whose HTML size is larger than about
100KB. The above URL page's HTML file is about 300KB when saved.

Saving the web page as "Web archive (single file)" doesn't seem to be
affected by this bug. Even if it was saved using Opera for Windows v11.64
build 1403, then opened using Opera v12.02 build 1578. Note: Opera for
Windows v11.64 build 1403 doesn't support reading of MHT file yet.

* * * * *

Reported as "DSK-376144". Also posted here, so users would know this
issue and avoid having corrupted saved web pages.

Does anyone know how to browse reported bugs? Cause, this is the reason I
posted here. If I could search it and found the same report, I won't have
to report it and could have avoided having corrupted saved web pages.

Damn it, some MDN pages are large. The corruption must be at all over the
places. This is a serious bug.