diff --git a/models/face_in_group_name_mid_file.obj b/models/face_in_group_name_mid_file.obj
new file mode 100644
index 000000000..7d049c6ef
--- /dev/null
+++ b/models/face_in_group_name_mid_file.obj
@@ -0,0 +1,9 @@
+v 10 20 30
+v 15 5 25
+v 1 5 10
+v 5 15 20
+f 1//1 2//2 4//4
+
+g An f Three Other Things
+v 5 15 21
+f 1 3 5
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index d99146593..7818fa9c6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,19 +6,14 @@ requires = ["setuptools >= 40.8", "wheel"]
 select = ["E", "F", # the default rules
           "T201",   # disallow print statements
 	   "B"]      # pass bugbear
-          #"I001",   # isort
-          #"D"]      # pydocstyle
 ignore = ["B905", # `zip()` without an explicit `strict=`
           "B904", # `raise ... from err` seems a bit silly
 	  "B018"] # useless expression ideally ignore only on `tests`
 line-length = 90
 
-[tool.ruff.pydocstyle]
-convention = "numpy"
-
-[tool.trimesh-setup.fetch.gltfvalidator]
-url = 'https://github.com/KhronosGroup/glTF-Validator/releases/download/2.0.0-dev.3.8/gltf_validator-2.0.0-dev.3.8-linux64.tar.xz'
-sha256 = '374c7807e28fe481b5075f3bb271f580ddfc0af3e930a0449be94ec2c1f6f49a'
-target = "$PATH"
-chmod = 755
-extract_only = "gltf_validator"
+[tool.autopep8]
+max_line_length = 90
+in-place = true
+recursive = true
+aggressive = 3
+verbose = true
\ No newline at end of file
diff --git a/tests/test_obj.py b/tests/test_obj.py
index f9213e330..51c4ac57f 100644
--- a/tests/test_obj.py
+++ b/tests/test_obj.py
@@ -430,6 +430,14 @@ def test_face_parsing_in_group_names(self):
         m = g.get_mesh('face_in_group_name.obj')
         assert len(m.vertices) == 1
 
+    def test_face_parsing_in_group_names_with_object_tag(self):
+        # Checks that an obj with a g tag in the middle of a file,
+        # containinig a face like name (an 'f ' followed by three
+        # space separated text chunks, ex: f 1 2 3), does load properly
+        m = g.get_mesh('face_in_group_name_mid_file.obj')
+        assert len(m.vertices) == 5
+        assert len(m.faces) == 2
+
 
 def simple_load(text):
     # we're going to load faces in a basic text way
diff --git a/trimesh/base.py b/trimesh/base.py
index 7e26d0e4e..7f04620d8 100644
--- a/trimesh/base.py
+++ b/trimesh/base.py
@@ -2410,7 +2410,6 @@ def apply_transform(self, matrix):
         # exit early if we've been passed an identity matrix
         # np.allclose is surprisingly slow so do this test
         elif util.allclose(matrix, np.eye(4), 1e-8):
-            log.debug('apply_transform passed identity matrix')
             return self
 
         # new vertex positions
diff --git a/trimesh/exchange/obj.py b/trimesh/exchange/obj.py
index b4e522d51..abfbd6803 100644
--- a/trimesh/exchange/obj.py
+++ b/trimesh/exchange/obj.py
@@ -132,7 +132,7 @@ def load_obj(file_obj,
         # after it finds the first newline
         # passed as arg as it's not a kwarg in python2
         face_lines = [i.split('\n', 1)[0].strip()
-                      for i in chunk.split('f ')[1:]]
+                      for i in re.split('^f', chunk, flags=re.MULTILINE)[1:]]
 
         # check every face for mixed tri-quad-ngon
         columns = len(face_lines[0].replace('/', ' ').split())
diff --git a/trimesh/version.py b/trimesh/version.py
index 88a361e4d..0e47affe4 100644
--- a/trimesh/version.py
+++ b/trimesh/version.py
@@ -1,4 +1,4 @@
-__version__ = '3.21.3'
+__version__ = '3.21.4'
 
 if __name__ == '__main__':
     # print version if run directly i.e. in a CI script
diff --git a/trimesh/viewer/trackball.py b/trimesh/viewer/trackball.py
index be871a3bb..cc2de2e8a 100644
--- a/trimesh/viewer/trackball.py
+++ b/trimesh/viewer/trackball.py
@@ -125,7 +125,9 @@ def drag(self, point):
             motion between this point and the one marked by down().
         """
         point = np.array(point, dtype=np.float32)
-        dx, dy = point - self._pdown
+        # get the "down" point defaulting to current point making
+        # this a no-op if the "down" event didn't trigger for some reason
+        dx, dy = point - getattr(self, '_pdown', point)
         mindim = 0.3 * np.min(self._size)
 
         target = self._target