Split view: editing on the right window cannot be saved directly by pressing Ctrl + S

[ytxmobile98]

Geany version: 1.32
OS: Ubuntu 18.04 LTS

Problem: When I split window and view two different text documents in the two windows, after I do some edit on the right window, pressing Ctrl+S does not save the document on the right, but instead saves the document on the left.
Expected result: Since when pressing Ctrl+S, my cursor is in the right window, the document in the right window shall be saved, instead of the one in the left window.

Gedit, on the other hand, does not have this problem.

[codebrainz]

Moved to Geany repository since this plugin is (confusingly) not in the Geany-Plugins project.

There are many similar issues with the Split Window plugin (search issues for "split"), including #1523.

[elextr]

To be clear, closed as duplicate.