I believe that nail polish can chip not only because of base and top coat but your personal chemistry. That might sound like a bunch of malarky but honestly there are some brands that work like a charm on me and last forever and others that chip within a day. I have multiple base and top coats around and have played around with them to make certain colors last longer.
Also the finish makes a difference. Foils, like graphite for example, tend to chip faster than creams. I also notice odd chipping with linear holos I think because there are strands of holo in it so if the strand gets knicked? I think they are kinda like those glitter bombs where if the glitter goes over the nail tip and gets knocked off it takes some polish with it...
Like I said that is just how I feel about it and not scientific {that I know of}
Try playing around with different bases and top coats, make sure to run the polish along nail tip edge {'wrap the polish'}, and maybe prep your nails with rubbing alcohol first to make sure there are no oils on it before putting on your base coat.
Many years ago {like 30} I read a book written in the 50s on glam and one of the things I remembered as being a daily beauty task was to check your polish every night and refresh in case of chips. In case of no chips another coat of topcoat was recommended for shine {I think it was a long time ago} Anyway..... This has been a universal problem and I don't mind thowing on an extra coat of a shade that I am wearing mid-week {assuming I stick with a color a whole week!!!!} or sometimes I start layering. I remember one week I ended up with 5 layers by end but I thought the nails looked good so feh.
OH! When I get a mani/pedi at salon sometimes I will smudge a nail before I leave and they brush a drop of nail polish remover over smudge to smooth it out and then do another coat. That is an idea if you only have a chip on one or two nails. OR, when I was younger, I lived by that nail polish sponge thing in jar like kwik off and would just redo single nails without messing up the others by using a remover soaked cotton pad. Which reminds me to get some more kwik off stuff. Thanks!