Pressing TAB key results in tabs in one document, but spaces in another

[WisTex]

I have this odd situation where one PHP document inserts a tab when I press the TAB key, but another PHP document, open at the same time, inserts spaces when I hit the TAB key.

Changing the settings seems to have no effect. Closing and reopening the files seems to have no effect. Closing and reopening Notepad++ seems to have no effect.

In sidebar.php I get spaces when I press TAB.
In daily.php I get tabs when I press TAB.

They are both PHP files, both have .php extension, and both have PHP set as the language in Notepad++.

In Settings, under Preferences, under Language, it is set not to use spaces for tabs (which is what I want). Yet certain files use tabs and certain files use spaces when I press the TAB key on the keyboard.

How do I get all files to behave the same?

[Michael Vincent]

@WisTex

What is your debug info from the menu:

? > Debug Info ...

It sounds like you may have a plugin installed that you forgot about? Namely:

Auto Detect Indentation:

Detects indention (tab or spaces) and auto adjust Tab key on-the-fly.
Author: Mike Tzou (Chocobo1)
Homepage: https://github.com/Chocobo1/nppAutoDetectIndent

Cheers.

[WisTex]

@Michael-Vincent Thank you so much. This was driving me crazy. Disabling it solved the problem. Much appreciated.

[Alan Kilborn]

This situation could also result from the use of the EditorConfig plugin, depending upon how it is configured with the .editorconfig files. Just sayin.