I use mouse and bluetooth keyboard and have no such issues using any other program but Libre Office.
When writing a document you click on a word or a paragraph and mostly it will jump and also select a whole line or word and move to the end of selection, or just move without selecting. Once it is there it stays there until I try to move it again. I just can’t figure out its logic and it is driving me insane. You can’t use mouse, only keyboard 100% while editing. No such issues happen with other apps. Well except maybe on this particular page where it decides to change page as you type in the search box without any sense. And no, my keys are not stuck.
OSX 10.15.17 LO 220.127.116.11
And finally how many ridiculous pictures do I need to click to get anything done??!?