Often the indent I see visually differs from what happens if I copy-paste the text to anywhere else. In such cases, backspacing the indentation in N++ deletes more than one whitespace. I'm unsure how exactly to MRE, but hopefully this behavior is known - how to disable it? (If it's not known, feel free to close.)
Windows 11 (CR LF), UTF-8, Notepad++ v8.5.4 (64-bit).