Unable to Restrict User Quota on WabDav


User quota is working fine on web browser but I am unable set to set user quota on webdav.

eg . I set user quota of 5G on USER-A, USER-A is restricted to exceed quota of 5 GB from web browser.
AT the same same if USER-A map nextcloud account with WebDav, There is no restriction on his quota. In fact WebDav mpaped drive size is much more than 5 GB.
Strugging with this from last 2 weeks.

Any help will be highly appreciated.