diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 92a60c6f..a3cdc17e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -11,7 +11,7 @@ jobs:
   manylinux_build:
     name: Build linux ${{ matrix.python.name }} wheel
     runs-on: ubuntu-latest
-    container: quay.io/pypa/manylinux2014_x86_64
+    container: quay.io/pypa/manylinux_2_28_x86_64
     env:
       ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
       GHA_USE_NODE_20: false
diff --git a/grid2op/Observation/baseObservation.py b/grid2op/Observation/baseObservation.py
index 0b716e81..1f9849aa 100644
--- a/grid2op/Observation/baseObservation.py
+++ b/grid2op/Observation/baseObservation.py
@@ -1253,10 +1253,10 @@ def reset(self) -> None:
         self.rho[:] = np.NaN
 
         # cool down and reconnection time after hard overflow, soft overflow or cascading failure
-        self.time_before_cooldown_line[:] = -1
-        self.time_before_cooldown_sub[:] = -1
-        self.time_next_maintenance[:] = -1
-        self.duration_next_maintenance[:] = -1
+        self.time_before_cooldown_line[:] = 0
+        self.time_before_cooldown_sub[:] = 0
+        self.time_next_maintenance[:] = 0
+        self.duration_next_maintenance[:] = 0
         self.timestep_overflow[:] = 0
 
         # calendar data
@@ -1318,6 +1318,13 @@ def reset(self) -> None:
         self.current_step = dt_int(0)
         self.max_step = dt_int(np.iinfo(dt_int).max)
         self.delta_time = dt_float(5.0)
+        
+        self._thermal_limit[:] = 0.
+        self.curtailment_limit[:] = 0.
+        self.gen_margin_up[:] = 0.
+        self.gen_margin_down[:] = 0.
+        self.curtailment_limit_effective[:] = 0.
+        self.curtailment[:] = 0. 
 
     def set_game_over(self,
                       env: Optional["grid2op.Environment.Environment"]=None) -> None:
diff --git a/grid2op/gym_compat/box_gym_obsspace.py b/grid2op/gym_compat/box_gym_obsspace.py
index 298488cb..fa88d303 100644
--- a/grid2op/gym_compat/box_gym_obsspace.py
+++ b/grid2op/gym_compat/box_gym_obsspace.py
@@ -628,6 +628,7 @@ def __init__(
 
         # handle the "functional" part
         self._template_obs = ob_sp._template_obj.copy()
+        self._template_obs.reset()
         self.__func = {}
 
         self._dims = None