Brightness keys do whatever they want (Swift SF314-56 Series)

Since about a week my brightness keys randomly increase of decrease brightness when pushed.
For instance pushing F3 twice will sometimes increase the brightness twice, decrease it twice or increase and drecrease it. Sometimes they work as intended and some others I need to push them several times for them to reach the highest or lowest brightness level before they do what they're supposed to do.

I've looked everywhere on the internet but it seems every related topics are for when brightness keys don't work at all.
I've downloaded the latest related BIOS and drivers and tried solutions acting as though brightness keys aren't working at all, however they still act as they want to.