unresolved
adjective /ˌʌnrɪˈzɒlvd/
  /ˌʌnrɪˈzɑːlvd/
(formal)- (of a problem or question) not yet solved or answered; not having been resolved
- These unresolved issues must be addressed.
 
Oxford Collocations DictionaryUnresolved is used with these nouns:- conflict
 - grief
 - issue
 - …