Tabs in Tabswitcher show modules from other tabs

Hi splunkers!

I have a structure like this:

...
    <module name="TabSwitcher" layoutPanel="panel_row1_col1">
      <param name="mode">independent</param>
        <module name="TimeRangePicker" layoutPanel="panel_row2_col1" autoRun="true" group="First">
          <module name="HiddenSearch" layoutPanel="panel_row2_col1" autoRun="true">
          ...
          </module>
          <module name="HiddenSearch" layoutPanel="panel_row6_col1" autoRun="true">
          ...
          </module>
        </module>

        <module name="TimeRangePicker" layoutPanel="panel_row2_col1" autoRun="true" group="Second">
          <module name="HiddenSearch" layoutPanel="panel_row2_col1" autoRun="true">
          ...
          </module>
          <module name="HiddenSearch" layoutPanel="panel_row8_col1" autoRun="true">
          ...
          </module>
        </module>

        <module name="NullModule" layoutPanel="panel_row2_col1" autoRun="true" group="Third">
          <module name="HiddenSearch" layoutPanel="panel_row2_col1" autoRun="true">
          ...
          </module>
          <module name="HiddenSearch" layoutPanel="panel_row10_col1" autoRun="true">
          ...
          </module>
        </module>
    </module>

When the first tab is opened there are 10 modules shown instead of 6, where first 6 of the modules are from the correct tab the others are from the tab with maximum number of modules. The same is with the second tab - 8 correct modules, 2 from the last tab.

Changing type of switcher (Link-, Tab-) didn't help so do changing the sequence of tabs with max and min number of modules.

How can I make splunk show only the modules of the selected tab or where I've done a mistake?