I recently upgraded from ArcGIS Pro 3.2 to ArcGIS Pro 3.4. I had my add-in toolbar rearranged in a certain way where I was stacking items in a compact form (see picture below). In my DAML, I have custom toolbar (module) where I have 3 groups of UI elements. My first group, I have a large button followed by three toolbars. Each toolbars had different UI elements such as labels, text boxes, and small buttons. When I upgraded to 3.4, all my UI elements were spaced out like below:

What has changed in 3.4 that caused this? How can I get it back to the way it was before? There is also a lot more spacing between UI elements.
My DAML looks like this:
<modules>
<insertModule id="MyAddin_Module" className="MyModule" autoLoad="true" caption="MyModule">
<tabs>
<tab id="My_Scene" caption="My toolbar">
<group refID="MyName_SceneGroup" />
<group refID="MyName_Group2" />
<group refID="MyName_Group3" />
</tab>
</tabs>
<groups>
<group id="MyName_SceneGroup" caption="Group" appearsOnAddInTab="false">
<button refID="ABC_LargeButton" size="large" />
<toolbar refID="RibbonControls_Toolbar1" />
<toolbar refID="RibbonControls_Toolbar2"/>
<toolbar refID="RibbonControls_Toolbar3"/>
</group>
<group id=...>
<group id=...>
</groups>
...
<toolbars>
<toolbar id="RibbonControls_Toolbar1">
<group>
<labelControl refID="MyTool_label" size="small"/>
<editBox refID="MyTool_editBox" size="small" />
<labelControl refID="MyTool_labelUnits" size="small" />
</group>
</toolbar>
...
</toolbars>
...
...