"End" of line button not working anymore

I used PyCharm for a while, nearly without problems. But since a few days, the "End" button (below "Home", next to "Delete" and "Page Down") is working in a weird behavior. Normally, this button should take me to the end of the current line. It works if the end of the line (EOL) is visible in the current window. But if it is longer than the window's width, it will not take me to the EOL but only jump a few characters forward in the line so I can see the last characters.

I try to illustrate my problem with a view images:

1. image: you see a vertically splitted PyCharm window with a very long line in the left area. The cursor (even though it's not visible here) is at the beginning of the line.

2. image: I hitted the "End" button to get to the end of the line. But instead, I end up somewhere in the middle, just far enough so I can see the end of the line.

3. image: similar problem if I now use the "Home" button: instead of going back to the beginning of the line, I end up somewhere in the middle, again far enough to the beginning so I can see the first character.

This becomes a really annoying problem when one wants to select a single line or multiple lines. If I normally want to select a bunch of lines, I go to the first one that should be selected, press "End" and use the up and down arrow keys to make my selection... But when I press "End", it does not select the whole line. It goes to the middle again. If I already selected a few characters, it will go to the middle and nothing is selected anymore.

Help would be really appreciated as this makes PyCharm somewhat unuseable for me. So far, I have not "reinstalled" it, but since I am using Linux, there is no real uninstallation. :-)

I would post this on the bug tracker, but I am just not sure if this is really a bug or if I accendentially changed some options. ("End" does not have this behavior in other programs, so it must be PyCharm related.)

Thanks for your attention and looking forward to a response!

Bye