Wow I won’t even reset it for the entire season. That’s way too much gambit 🤣 But it sounds like some type of glitch with the golf balls after they made the changes. Probably thinks you have too many.

Apparently its the same with Ascendant Alloys, despite having the cap raised the vendor still expects a cap of 10 and if you are at/over that then you can't take it. Bungie clearly forgot something, report it in the game issues threads and hopefully Bungo will fix it soon. But it doesn't benefit the player so don't expect a quick fix. Its a big problem though, everyone will be ranking vendors up and making use of the new material caps so it will affect everyone eventually.