Submodules are updated even if "Check submodules before commit & push" option is off

Set the option "Check submodules before commit & push" to off.

Then checkout to an arbitrary local branch
While checking out, click on "Show full output".
The output I see is

git -c diff.mnemonicprefix=false -c core.quotepath=false checkout master
M src/BunnyTail/BunnyTail.csproj
M src/BunnyTail/Program.cs
M src/BunnyTail/packages.config

Already on 'master'

git -c diff.mnemonicprefix=false -c core.quotepath=false submodule update --init --recursive
Completed successfully.

That is, a git submodule update is performed.
Is it correct?