Both items show up as generic backpacks on the map. All other backpacks have a unique icon so it definitely seems unintentional.
Steps to Reproduce
c_spawn("icepack") , c_spawn("seasack") , open map
c_spawn("icepack") , c_spawn("seasack") , open map
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.