UDL Bug: Escaping Behavior for the Operators1 Group not as Expected

Description of the Issue

If having an "operator" in the Operators1 group that starts with the same character as the defined escape character for one or more Delimiters groups, escaping is NOT working as expected.

Steps to Reproduce the Issue

1. Define an escape character, e.g. a ` (backtick, the escape character in PowerShell), to one or more of the (defined) Delimiters groups. In the Delimiter's Styler Dialog make sure the Operators1 box is ticked. Also make sure there are different color settings for the Delimiter and Operators1 groups.
2. To the Operators1 Group add a multi-character "operator" that starts with the same character as the escape character, e.g. `n (the newline character in PowerShell).
3. Surround the "operator" with the delimiters, e.g. "`n" or "`nSomeText" in a script file that supports the defined UDL.

Expected Behavior

The expected behavior would be for the `n character to NOT be escaped i.e not highlighted in the color of the delimiter.

Actual Behavior

The `n operator IS escaped and highlighted in the delimiter color. That behavior would only be expected if one more backtick was preceding, like in "``n" or "``nSomeText"

The bug is NOT present in any of the Keywords groups or the Operator2 group, where escaping behavior is as expected.

Debug Information

Notepad++ v7.9.5 (64-bit)
Build time : Mar 21 2021 - 02:13:17
Path : C:\Program Files\Notepad++\notepad++.exe
Admin mode : OFF
Local Conf mode : OFF
OS Name : Windows 10 Pro (64-bit)
OS Version : 2009
OS Build : 19042.985
Current ANSI codepage : 1252
Plugins : mimeTools.dll NppConverter.dll NppExport.dll

Reproduce the UDL case in Notepad++ using a Delimiters group with escaping enabled and an Operators1 entry such as `n, then compare its highlighting with Keywords and Operators2. Trace the syntax-highlighting path for delimiter escaping and Operators1 matching; done means the operator is not escaped unless an additional escape character precedes it.