I’m glad Zwift were able to replace your missing BMX.
Did they replace any missing Drops?
Did they explain any reasons why your BMX was missing?
Paul has given many many people the help they need on these forums and is generally spot on with his advice.
You are new here to the forum and have probably not had time to search and read formal Zwift advice about being logged into two devices at the same time. You possibly don’t need to delete Zwift from your phone but if you don’t use it to run the game it might be best. Whether you delete or not you really need to ensure you are fully logged out of the game on your phone when you run the game on your other device or you will likely experience similar issues again in the future.