I would use it until it goes dead. We had a similar issue with Easton Stealth Flex 2017. It was much worse than what I see on this bat. The bat performed very well then developed cracks/spiderwebbing in paint that lead to eventual cracks in the composite itself. Just make sure you have a back-up bat because there really is no way to determine how much more use you will get out of the bat.I saw this on my DD's bat the other day. There's another one on the opposite side of it. Not sure if it's enough to warrant a replacement or not, and don't want to send in right now.
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We have the 32” 22oz version and no problems for last two years.My DDs cracked like that this weekend on her replacement bat. Called Easton today and I was 4 days past my warranty period but they said they will replace it since it happen so close to the date. Unfortunately CS said they are out of 32/21 and dont know when a new shipment comes in the distribution center.