Lack of functionality from web interface when managing btrfs pool

BTRFS
1
  1. Can’t remove drive from pool in single mode from web interface but from btrfs remove device working normal
  2. Can’t remove drive from poll is raid 0 mode with 3 drive from web interface, from command line working.
  3. Can’t create pool with single mode for data and raid1 mode for metadata from webinterface.