Could you please specify which issues. Since VLC media player 3.0.0 there have been several updates and many fixes, as you can see in the changelog. I use VLC media player 3.x since version 3.0.3, and by now I use 3.0.6. Regarding security, in versions 3.0.3 and 3.0.5 numerous 3rd party libraries were updated, fixing security issues. These 3rd party libraries were not updated in 2.2.8, leaving 2.2.8 less secure.