I suspect this is a general linux issue, either at the core or the desktop management level, and not something LL controls. But this is my main linux portal.
I have found the way the cursor is handled to be a nuisance. If you double-click a word in LL (I'm ascertained this in LibreOffice and Slimjet), only the word is selected. Neither the space before or after is included. Similarly, the CTRL[-Shift]-left/right arrow key combination does not include the trailing space.
The problem with that is that if you either Cut or Drag and Drop your selection, you are left with a double space where it once was, and you will be missing a space where you Drop or Paste it.
Also, when deleting a word with the CTRL-Del/Backspace key combo, an extra delete must be employed for the untouched space.
It also creates some navigational anomalies with commas and such when CTRL-left/right arrow keying around the document. The cursor will skip over words entirely and have to be returned using the opposing arrow key. Or at the very least you have to advance the cursor an extra space to get to the beginning of the next word.
This is a relatively small thing, I know, but it breaks the flow of typing, and I continually have to check to make sure I've accommodated the way linux works in this regard. It would be better, IMV, if the word selection algorithm were to include the word boundary on the far side of the word.
