Hi @Fortune-Red I'm sorry to hear that you are unable to try the workaround suggested previously.
I can confirm that this issue happened with update 1.5.0.1. The issue has since been fixed and should no longer occur.
I suspect this issue had occurred previously when you last played the game. The fix prevented this issue from occurring again and any players who had purchased any weapons or gear were refunded 1 rune per type that was lost or sold, unless already present in their inventory.