xamarin.forms - Xamarin Forms Drop-down does not render properly on UWP, looks fine on IOS -


i have searched answer way time , has able me? following snippet view in portable project. list references above , snippet. when open in windows instead of seeing drop-down icon defaulted , text (two items drop down total). see grey box instead , when click it, drop down choice text moves way top/left corner of simulator. please help!

<contentpage xmlns="http://xamarin.com/schemas/2014/forms"   xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"   xmlns:local="clr-namespace:portfolioviewer;assembly=portfolioviewer"   xmlns:globalresources="clr-namespace:portfolioviewer.globalresources;                     assembly=portfolioviewer"   xmlns:qxfutils="clr-namespace:qxfutilities;assembly=qxfutilities"   xmlns:ffimageloading="clr-namespace:ffimageloading.forms;assembly=ffimageloading.forms"   xmlns:ffimageloadingsvg="clr-namespace:ffimageloading.svg.forms;assembly=ffimageloading.svg.forms"   xmlns:cv="clr-namespace:xamarin.forms;assembly=xamarin.forms.carouselview"   x:class="portfolioviewer.homepage"     x:name="homepage"              >

snippet not render properly

 <!-- company selector -->  <grid    grid.column="2"    grid.row="1"     columnspacing="0"    rowspacing="0"    verticaloptions="fill"    horizontaloptions="fill"     margin="0, 0, 0, 5"   > <grid.rowdefinitions>   <rowdefinition height="*"></rowdefinition>   <rowdefinition height="2*"></rowdefinition>   <rowdefinition height="*"></rowdefinition> </grid.rowdefinitions> <grid.columndefinitions>   <columndefinition width="2*"></columndefinition>   <columndefinition width="*"></columndefinition> </grid.columndefinitions> <ffimageloadingsvg:svgcachedimage    x:name ="dropdownlist1icon"   grid.column="0"   grid.row="0"    grid.rowspan="3"   horizontaloptions="end"   verticaloptions="fill"   aspect="aspectfit"   source="{binding companytheme, converter={staticresource themeiconconv}, converterparameter={staticresource selecticon}}"                           /> <ffimageloadingsvg:svgcachedimage    grid.column="1"   grid.row="1"    horizontaloptions="start"   verticaloptions="fill"   margin="3, 0, 5, 0"   aspect="aspectfit"   source="{x:static globalresources:icons.downchevronimagesource}" /> <button   x:name="dropdownlist1button"   grid.column="0"   grid.row="0"   grid.columnspan="2"   grid.rowspan="3"   horizontaloptions="fill"   verticaloptions="fill"   bordercolor="transparent"   clicked="onddl1buttonclicked" /> </grid>

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