Can't change icon of host map element, if selected icon mapping in map properties

Steps to reproduce:
1. Create icon mapping
2. Create map and select icon mapping
3. Add host element
4. Open element properties, uncheck 'Automatic icon selection' and change element default icon
5. Save map
6. Open map constructor and select element
Result: option 'Automatic icon selection' checked and icon block disabled
Expected result: option 'Automatic icon selection' unchecked and icon block enabled

Also in map constructor displayed two icons of element, one default icon mapping and one default map element icon