switching channel in flutter it is repeating the download of all flutter tools

[Guidus Vendra]

Hi, i am learning app dev with flutter,  in the futter channel stable as recommended and some flutter WEB too but in channel beta.  Is recommended to switch the channel to beta for web dev. The problem is that every time i return to the stable channel or vice versa, I run the upgrade or even without running upgrade but just lunching the app form android studio,  flutter is again downloading all the tools for ios and android, loads of files and it takes ages and i don't know why is always downloading.  What do you think?  Thanks