diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1423f1761f..3a1c981c59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,8 @@
 ### New features
 * Integrate jointplot into pairplot, add point-estimate and overlay of plot kinds #1079
 ### Maintenance and fixes
-
+* Fixed behaviour of `credible_interval=None` in `plot_posterior` (#1115)
+* Fixed hist kind of `plot_dist` with multidimensional input (#1115)
 ### Deprecation
 
 ### Documentation
diff --git a/arviz/plots/backends/bokeh/distplot.py b/arviz/plots/backends/bokeh/distplot.py
index 42f8917368..987c616169 100644
--- a/arviz/plots/backends/bokeh/distplot.py
+++ b/arviz/plots/backends/bokeh/distplot.py
@@ -115,7 +115,7 @@ def _histplot_bokeh_op(values, values2, rotated, ax, hist_kwargs):
     if bins is None:
         bins = get_bins(values)
     density = hist_kwargs.pop("density", True)
-    hist, edges = np.histogram(values, density=density, bins=bins)
+    hist, edges = np.histogram(np.asarray(values).flatten(), density=density, bins=bins)
     if hist_kwargs.pop("cumulative", False):
         hist = np.cumsum(hist)
         hist /= hist[-1]
diff --git a/arviz/plots/backends/matplotlib/distplot.py b/arviz/plots/backends/matplotlib/distplot.py
index 1c56e27883..193bcc98f5 100644
--- a/arviz/plots/backends/matplotlib/distplot.py
+++ b/arviz/plots/backends/matplotlib/distplot.py
@@ -1,10 +1,11 @@
 """Matplotlib distplot."""
 import warnings
 import matplotlib.pyplot as plt
-
+import numpy as np
 from . import backend_show
 from ...kdeplot import plot_kde
 from ...plot_utils import matplotlib_kwarg_dealiaser
+from ...plot_utils import get_bins
 
 
 def plot_dist(
@@ -91,8 +92,10 @@ def _histplot_mpl_op(values, values2, rotated, ax, hist_kwargs):
         raise NotImplementedError("Insert hexbin plot here")
 
     bins = hist_kwargs.pop("bins")
+    if bins is None:
+        bins = get_bins(values)
+    ax.hist(np.asarray(values).flatten(), bins=bins, **hist_kwargs)
 
-    ax.hist(values, bins=bins, **hist_kwargs)
     if rotated:
         ax.set_yticks(bins[:-1])
     else:
diff --git a/arviz/plots/distplot.py b/arviz/plots/distplot.py
index cb2234db6e..af7aefc985 100644
--- a/arviz/plots/distplot.py
+++ b/arviz/plots/distplot.py
@@ -1,7 +1,9 @@
 # pylint: disable=unexpected-keyword-arg
 """Plot distribution as histogram or kernel density estimates."""
 
+import xarray as xr
 from .plot_utils import get_bins, get_plotting_function, matplotlib_kwarg_dealiaser
+from ..data import InferenceData
 from ..rcparams import rcParams
 
 
@@ -142,6 +144,13 @@ def plot_dist(
 
         >>> az.plot_dist(b, rug=True, quantiles=[.25, .5, .75], cumulative=True)
     """
+    if isinstance(values, (InferenceData, xr.Dataset)):
+        raise ValueError(
+            "InferenceData or xarray.Dateset object detected,"
+            " use plot_posterior, plot_density or plot_pair"
+            " instead of plot_dist"
+        )
+
     if kind not in ["auto", "kde", "hist"]:
         raise TypeError('Invalid "kind":{}. Select from {{"auto","kde","hist"}}'.format(kind))
 
diff --git a/arviz/plots/posteriorplot.py b/arviz/plots/posteriorplot.py
index 0d1139fd53..e7656e9dbe 100644
--- a/arviz/plots/posteriorplot.py
+++ b/arviz/plots/posteriorplot.py
@@ -22,7 +22,7 @@ def plot_posterior(
     coords=None,
     figsize=None,
     textsize=None,
-    credible_interval=None,
+    credible_interval="auto",
     multimodal=False,
     round_to: Optional[int] = None,
     point_estimate="auto",
@@ -189,9 +189,9 @@ def plot_posterior(
     if coords is None:
         coords = {}
 
-    if credible_interval is None:
+    if credible_interval == "auto":
         credible_interval = rcParams["stats.credible_interval"]
-    else:
+    elif credible_interval is not None:
         if not 1 >= credible_interval > 0:
             raise ValueError("The value of credible_interval should be in the interval (0, 1]")