Without knowing for sure, I think Easton uses the same glue for the stakes as for putting tips and knocks on their aluminum arrows. The glue fails in the cold. A solution would be to drill them and rivet or pin them if you otherwise like them AND tell Easton. This is probably the same glue they assemble tent poles with. The shock of pounding the stakes breaks the bond in cold weather probably.
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Catch & Release unless you are starving!