Fixed: Using absolute episode number in Standard Format for episode without while renaming

src/NzbDrone.Core.Test/OrganizerTests/FileNameBuilderTests/AbsoluteEpisodeFormatFixture.cs

@@ -83,5 +83,16 @@ namespace NzbDrone.Core.Test.OrganizerTests.FileNameBuilderTests
             Subject.BuildFileName(new List<Episode> { _episode }, _series, _episodeFile)
                    .Should().Be("Anime Series S15E06 [SonarrTest]");
         }
+
+        [Test]
+        public void should_use_standard_format_without_absolute_numbering_if_absolute_format_requires_absolute_episode_number_and_it_is_missing()
+        {
+            _episode.AbsoluteEpisodeNumber = null;
+            _namingConfig.StandardEpisodeFormat = "{Series Title} S{season:00}E{episode:00} - {absolute:00}";
+            _namingConfig.AnimeEpisodeFormat = "{Series Title} {absolute:00} [{ReleaseGroup}]";
+
+            Subject.BuildFileName(new List<Episode> { _episode }, _series, _episodeFile)
+                .Should().Be("Anime Series S15E06");
+        }
     }
 }

src/NzbDrone.Core/Organizer/FileNameBuilder.cs

@@ -70,7 +70,7 @@ namespace NzbDrone.Core.Organizer
                                                                             RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private static readonly Regex FileNameCleanupRegex = new Regex(@"([- ._])(\1)+", RegexOptions.Compiled);
-        private static readonly Regex TrimSeparatorsRegex = new Regex(@"[- ._]$", RegexOptions.Compiled);
+        private static readonly Regex TrimSeparatorsRegex = new Regex(@"[- ._]+$", RegexOptions.Compiled);
 
         private static readonly Regex ScenifyRemoveChars = new Regex(@"(?<=\s)(,|<|>|\/|\\|;|:|'|""|\||`|~|!|\?|@|$|%|^|\*|-|_|=){1}(?=\s)|('|:|\?|,)(?=(?:(?:s|m)\s)|\s|$)|(\(|\)|\[|\]|\{|\})", RegexOptions.Compiled | RegexOptions.IgnoreCase);
         private static readonly Regex ScenifyReplaceChars = new Regex(@"[\/]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
@@ -540,7 +540,7 @@ namespace NzbDrone.Core.Organizer
             int index = 1;
             foreach (var absoluteEpisodeFormat in absoluteEpisodeFormats)
             {
-                if (series.SeriesType != SeriesTypes.Anime)
+                if (series.SeriesType != SeriesTypes.Anime || episodes.Any(e => !e.AbsoluteEpisodeNumber.HasValue))
                 {
                     pattern = pattern.Replace(absoluteEpisodeFormat.AbsoluteEpisodePattern, "");
                     continue;