Yes, that is default configuration.
Maybe you changed that by mistake.
To change/check that:
First check which volume type is selected.
- Goto Setting (of cryptomator app).
- select 2nd tab
- check if volume type is “dokany”.
Then we have to check the vault setting
- Click on your (closed) vault in the vault list.
- select “Vault options”
- select 2nd tab “Volume”
- check if the option is enabled to configure a drive letter and check the configured drive letter.