Why does clicking the refresh button collapse the folder tree?

[ncnnnn]

before refresh:
 
 root
      a
        ----b  This is the current directory
      c
        ----d

after  refresh:

 root
     a
       ----b
     c
   
           

[Mathias (Author)]

That because when you refresh it actually rebuild the entire UI tree and make sure that all folder and files are in sync (exists)

[ncnnnn]

ok. thank you.

Recently, I have been using mapped Linux. I modified files under Windows, but it's difficult to automatically sort them to the top based on modification time. Clicking the modification time repeatedly doesn't update it. I have no choice but to use the refresh button. However, the refresh button not only refreshes the file panel, it also collapses the folder tree during synchronization.