The new app stores 'Shared' inventories on new servers, thus your inventories are not currently in-sync
You will need to re-sync the inventories with your team members
To do that, only one team member will need to do the following procedure:
1. Make sure that everybody in the team has the new app - version > 5.0. The version can be found 'Settings'
2. Make sure that everybody has the SYNC license
3. Everybody needs to re-authenticate
4. Long tap on an inventory -> Share -> add all the users
5. Remove the duplicate inventory that is not shared (in case there is any)