Can't save more than one file

Hi, I have a problem with my WinSCP, when I open more than one file, I can save only first one. Let's say I open function.php and style.css. If I first open function I can save only that file, style dont react, when I'm trying to save it. But if I close whole VScode and open style first, I can't save function but can save style. Can you help me with this issue?

Make sure you did not enable "External editor opens each file in separate window (process)" editor setting:
https://winscp.net/eng/docs/ui_editor_preferences