I typically use Jaikoz on a MacBook and use the trackpad and keyboard to navigate around. Hopefully I can explain this clearly. In version 10 if I was viewing a table that was wider than the screen and tried to scroll either up or down it would randomly select up or down but more frustrating than that is that I would get a side-scroll back to the leftmost column of the table. What I expected to be a simple scroll up or down a few lines wound up making the entire table bounce around up, down and sideways before settling on the leftmost column. I downgraded back to version 9.30 and this problem disappears. I have not made any changes on my MacBook, running Mojave, to explain this. Any suggestions are appreciated but answers are extremely welcome 
Odd scrolling Behavior in Mac Version of Jaikoz 10
I have retested on MacOS El Capitan and Catalina, I no longer have a Mac running Mojave but I think it is very unlikely this is a Mojave specific issue, I cannot reproduce the error as you describe it.
Are you loading many files, if so does the problem still occur if only load a few files ?
If so is it possible for you to create an upload a short video showing the problem ?