Arrow Key Shortcuts Seem Buggy

When typing notes, I would like to be able to use the Cmd + Arrow Key shortcuts to jump around in my note document (Cmd + Left = beginning of current line, Cmd + Right = end of current line, Cmd + Up = beginning of document, Cmd + Down = end of current document). This is standard functionality in most text editors (e.g., Word, the text editor on this forum that I'm using right now, etc.).

However, in Logos on iPad any one of those combinations yields the same result as Cmd + Up (all four arrow keys do the same thing). In Logos on Mac, the Left / Right shortcuts work properly, but not Up / Down.

Similarly, I would like to use Cmd + Shift + Arrow Key shortcuts for text selection. This usually selects all the text between the current cursor location and the destinations listed above for the other shortcuts. In Logos on Mac, Up / Down works for this shortcut even though it doesn't for the other one. I'm also having problems with this in Logos for iPad.

The partial functionality seems to indicate that Logos intended for this to work, but perhaps there are bugs? I'm seeing similar things in Sermon Editor as well as Notes.

Note: for users on Windows, these shortcuts would just use Ctrl instead of Cmd.