I don’t think that there is any change in folding behavior, concerning HTML Files

But, while doing some tests, I notice some weird things about folding :

The HTML text, ( certainly not valid ! ) which will be used for tests is :

<script src="JS/jquery.min.js"></script>
<p>This is a paragraph.</p>
<p>This is a second paragraph.</p>
<script charset="utf-8">
    $(document).ready(function() {
        alert('1');
    });

    function test(val) {
        alert('2');
    }
</script>

I simply added an empty line at the very beginning and two paragraph attributes between the two <script...> lines

Now, follow these steps :

• Start Notepad++ v7.9.2

• Open a new tab

• Run the option Language > H > HTML

=> In the Status Bar, you should see, at the leftmost part, the indication Hyper Text MArkup Language file

• Paste the HTML text, above, in this new tab

=> You should get the text seen in the Fig. A, below. Note that the folding between lines 5 and 13 seems identical to the one that @hy-yang noticed in old N++ version 7.6.6

• Delete the < symbol, beginning the line 2 and, immediately rewrite it

=> Folding has not changed and looks like in the Fig A below !

• Now, delete the < symbol, beginning the line 3 and, immediately rewrite it

=> The folding, in the Fig B, is identical to the Fig A ( between lines 5 and 13 )

• Then, delete the < symbol, beginning the line 5 and, immediately rewrite it

=> This time, in the Fig C below, folding has a better look, with the Test function considered as a specific section. Note, however, that this folding is not, exactly, what @hy-yang and me expect to, yet !

• Finally delete the < symbol, beginning the line 4 and, immediately rewrite it

=> At last, the resulting folding, in the Fig D below, is the correct and expected one ;-))

If, instead of working with the < symbol, beginning the lines, we would had chosen the > symbol, ending each line, we would had got, the same folding behavior !

IMPORTANT : In the picture above, I, intentionally, changed the default background of current line ( for color FF C0 C0 ) in order to easily locate the line where the < symbol is deleted and rewritten at once !

So, seemingly, modifying the line, right above the <script>.........</script> section restores the correct folding in that section ?

So, guys, just experiment !

Best Regards

guy038

Sorry, I forgot to give my debug-info :

Notepad++ v7.9.2   (32-bit)
Build time : Dec 31 2020 - 03:58:36
Path : D:\@@\792\notepad++.exe
Admin mode : OFF
Local Conf mode : ON
OS Name : Microsoft Windows XP (32-bit) 
OS Build : 2600.0
Current ANSI codepage : 1252
Plugins : BetterMultiSelection.dll DSpellCheck.dll mimeTools.dll NppConverter.dll NppExport.dll 

In v7.7, Notepad++ upgraded an underlying library, Scintilla, which handles things like the code folding. Many things about Scintilla improved with the upgrade. However, you have found an instance where it apparently doesn’t handle folding in mixed file types (html+is) the way you would like.

Notepad++ is not going to downgrade Scintilla to go back to the way you like. As a result, you might choose to just stick with v7.6.6, which works the way you like, and just turn off auto update