diff --git a/CHANGELOG b/CHANGELOG
index 2b9e9fe..89db1f6 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,5 @@
 2.23.3
+ - fix: cache selected event per dataset in QuickView (#196)
  - enh: add new logo (scope view and block matrix)
 2.22.2
  - fix: error message dialog limited to traceback length of three
diff --git a/dcscope/gui/quick_view/qv_main.py b/dcscope/gui/quick_view/qv_main.py
index 62959e5..c88f74e 100644
--- a/dcscope/gui/quick_view/qv_main.py
+++ b/dcscope/gui/quick_view/qv_main.py
@@ -871,7 +871,7 @@ def show_event(self, event):
         # dataset
         ds = self.rtdc_ds
         self._dataset_event_plot_indices_cache[
-            id(self.rtdc_ds.hparent)] = event
+            id(self.rtdc_ds.hparent)] = int(event)
         event_count = ds.config["experiment"]["event count"]
         if event_count == 0:
             # nothing to do
@@ -1019,7 +1019,7 @@ def show_rtdc(self, rtdc_ds, slot):
         self.spinBox_event.setMaximum(event_count)
         self.spinBox_event.setToolTip("total: {}".format(event_count))
         cur_value = self._dataset_event_plot_indices_cache.get(
-            id(rtdc_ds), 0) + 1
+            id(self.rtdc_ds.hparent), 0) + 1
         self.spinBox_event.setValue(cur_value)
         self.spinBox_event.blockSignals(False)
 
diff --git a/tests/test_gui_quickview.py b/tests/test_gui_quickview.py
index 66aba65..58b700b 100644
--- a/tests/test_gui_quickview.py
+++ b/tests/test_gui_quickview.py
@@ -1117,3 +1117,95 @@ def test_select_x_y_axis_based_on_unavailable_feature_name_issue_206(qtbot):
     # Since the feature is not available in dataset-2, it should be set
     # to "deform" (first option in default choice)
     assert qv.comboBox_y.currentData() == "deform", "Check manual selection"
+
+
+def test_cache_selected_event_using_dataslot_issue_196(qtbot):
+    """Event selection should be cached when switching between datasets"""
+
+    mw = DCscope()
+    qtbot.addWidget(mw)
+
+    # add dataslots
+    path1 = datapath / "calibration_beads_47.rtdc"
+    path2 = datapath / "blood_rbc_qpi_data.rtdc"
+    mw.add_dataslot(paths=[path1, path2])
+
+    assert len(mw.pipeline.slot_ids) == 2, "we added that"
+    assert len(mw.pipeline.filter_ids) == 1, "automatically added"
+
+    # Get the slot_id of the first data slot
+    slot_id1 = mw.pipeline.slot_ids[0]
+    filt_id = mw.pipeline.filter_ids[0]
+
+    # activate dataslot-1
+    em1 = mw.block_matrix.get_widget(slot_id1, filt_id)
+    qtbot.mouseClick(em1, QtCore.Qt.MouseButton.LeftButton,
+                     QtCore.Qt.KeyboardModifier.ShiftModifier)
+
+    em1 = mw.block_matrix.get_widget(slot_id1, filt_id)
+    qtbot.mouseClick(em1, QtCore.Qt.MouseButton.LeftButton)
+
+    # did that work?
+    assert mw.pipeline.is_element_active(slot_id1, filt_id)
+    assert mw.toolButton_quick_view.isChecked()
+
+    # selected events
+    slot1_event = 3
+    slot2_event = 6
+
+    # Get QuickView instance
+    qv = mw.widget_quick_view
+
+    # Open plot (settings) tool of QuickView
+    plot_tool = qv.toolButton_settings
+    qtbot.mouseClick(plot_tool, QtCore.Qt.MouseButton.LeftButton)
+
+    # select an event index in slot1
+    qv.show_event(slot1_event)
+
+    # Get the id of the current dataset
+    ds_id1 = id(qv.rtdc_ds.hparent)
+
+    # check whether event 4 is saved in cache dict
+    assert qv._dataset_event_plot_indices_cache[ds_id1] == slot1_event
+
+    # Do we have the correct event shown?
+    assert qv.spinBox_event.value()-1 == slot1_event
+
+    # Get the slot_id the second data slot
+    slot_id2 = mw.pipeline.slot_ids[1]
+    # Activate data slot-2
+    em2 = mw.block_matrix.get_widget(slot_id2, filt_id)
+    qtbot.mouseClick(em2, QtCore.Qt.MouseButton.LeftButton,
+                     QtCore.Qt.KeyboardModifier.ShiftModifier)
+
+    em2 = mw.block_matrix.get_widget(slot_id2, filt_id)
+    qtbot.mouseClick(em2, QtCore.Qt.MouseButton.LeftButton)
+
+    # did that work?
+    assert mw.pipeline.is_element_active(slot_id2, filt_id)
+
+    # select an event index in slot2
+    qv.show_event(slot2_event)
+
+    # Do we have the correct event shown?
+    assert qv.spinBox_event.value()-1 == slot2_event
+    ds_id2 = id(qv.rtdc_ds.hparent)
+
+    # check whether slot2_event is exists in cache dict
+    assert qv._dataset_event_plot_indices_cache[ds_id2] == slot2_event
+
+    # now switch back to slot1 and check event
+    em1 = mw.block_matrix.get_widget(slot_id1, filt_id)
+    qtbot.mouseClick(em1, QtCore.Qt.MouseButton.LeftButton,
+                     QtCore.Qt.KeyboardModifier.ShiftModifier)
+
+    em1 = mw.block_matrix.get_widget(slot_id1, filt_id)
+    qtbot.mouseClick(em2, QtCore.Qt.MouseButton.LeftButton)
+
+    # Do we still have the correct event shown?
+    assert qv.spinBox_event.value()-1 == slot1_event
+
+    # check whether slot1_event, slot1_even2 are still exists in cache dict
+    assert qv._dataset_event_plot_indices_cache[ds_id1] == slot1_event
+    assert qv._dataset_event_plot_indices_cache[ds_id2] == slot2_event