Addressable Download issue

I am making a simple click on the screen to pop up the download box, the download box shows the traffic to download and confirm & cancel button
1. If I use UpdateCatalogs, this will be saved to the local, so if I click the cancel button and re-CheckforCatalogUpdates, the returned List<string> count will be 0, so I cannot continue to download
2. Then i try to use Addressables.ResourcesLocators to replace UpdateCatalogs , it works in unity well, but when i packed into iPhone, first time it will download assets correctly, then i change a prefab, Update a Previous Build-> upload the bundle on my server, i can see the catalogs have changes to update, however the keys of GetDownloadSizeAsync have not changed and therefore always return 0, so download failed
3. So i try to use Label to download . As same as Point 2, It is found in iPhone that the catalogs have changes to update, but GetDownloadSizeAsync keeps returning 0, then download failed

 

2 and 3 work in unity perfectly, but not work in iPhone, is there something I missed?