Restore system prompt on requests

server/images.go

@@ -66,13 +66,9 @@ func (m *Model) Prompt(request api.GenerateRequest) (string, error) {
 	}
 
 	vars.First = len(request.Context) == 0
-
+	vars.System = m.System
 	vars.Prompt = request.Prompt
 
-	if len(request.Context) == 0 {
-		vars.System = m.System
-	}
-
 	if request.System != "" {
 		vars.System = request.System
 	}