@GBGenthusiast , there have been problems with I-Series tips and tip boxes for years now.
Beckman will replace your tip lot if you provide them this information. However, they will not share this information to any other customer, nor tell you if other customers are having issues with other lots.
To help the community best, you should indicate what Cat # & Lot #s you are seeing issues with here for NX/FX tips, like I did for I series tips.