That's a real odd chip at the bottom of the S. You don't see that often at all. I have a memorial cent where the bottom of the S in PLURIBUS is chipped. This is the only other time I've seen an S chipped like that. The chip in the date, I think you're right, those dates seem to have more chips than normal. Congrats on the unique find.
For a long time I segregated these "filled letters" die chips and sold them in rolls on eBay for a bit of premium.