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Bought the new Balhrafn Atgeir along with the Balhrafn Bow from Vagn's river raid shop after the update. Later, I went back to the shop to buy other things, and the Balhrafn Atgeir and Bow had reappeared in the shop. This is similar to a recent bug for Hilda's shop that had weapons reappear after purchase (creating the risk of accidentally buying duplicates).
At first I thought maybe I had misremembered buying them, but could see the Balhrafn Atgeir in my inventory. When I checked the bow, I found a bow of identical quality, with identical stats, to the Balhrafn Bow, but the bow was missing a name and the special trait area was blank (but had the symbol).