fix on only 1 message phase empty context

models/ta_models/ta_filter_utils.py

@@ -90,7 +90,7 @@ def get_phases_islands_minmax(
         # If there is more than one island we want to make sure to root out comparable small islands
         # I.e. if there is an island with 10 messages, and island of 1 messages is not useful in that context.
         max_len = np.max([len(x) for x in islands])
-        len_cut = 3 if max_len > 9 else 2 if max_len > 3 else 1
+        len_cut = 3 if max_len > 9 else 2 if max_len > 3 else 1 if max_len > 1 else 0
         islands = [x for x in islands if len(x) > len_cut]
 
     islands = [reset.iloc[x] for x in islands]