Are impact driver bits a different standard than screwdriver bits?
Those little bits aren't really made to go straight into the chuck.  Even if the chuck is made to grip the little grooves, it's hard to see the tip with it so close to the chuck.  There might not be enough room to get the whole nose of the driver in that close to the screw.  Those bits

are best put into a bitholder - the bitholder will grip the little grooves so it doesn't fall out, and it gets it away from the chuck a bit.

You can also buy screwdriver bits that are made for the chuck, and these bits will be long enough that they are easy to use placed directly in the chuck.  You can see it has the same style shank as the bitholder.

There are about four million of these in HD, L's, etc.