Update xamarin forms and maps regression

Hello all,

I've been occupied on other things this summer and wanted to update all my project's packages. Everything's fine, building and so ...

But I've got a probleme on the map. I was using the showing user option on the map to allow the user to find himself like on GoogleMap (the button on top right to go there) but it disappeared and I can't figure out why.

Notice that I'm using package TK.CustomMap for my project but which extends Xamarin Forms Maps and I got the prob since I updated Xamarin.Forms.Maps package

Did someone met the same problem after updating to last version of Xamarin.Forms.Maps ?

<package id="Xamarin.Forms" version="2.3.4.224" targetFramework="portable45-net45+win8+wp8+wpa81" />
  <package id="Xamarin.Forms.Maps" version="2.3.3.193" targetFramework="portable45-net45+win8+wp8+wpa81" />

TO

<package id="Xamarin.Forms" version="2.3.4.270" targetFramework="portable45-net45+win8+wp8+wpa81" />
  <package id="Xamarin.Forms.Maps" version="2.3.4.270" targetFramework="portable45-net45+win8+wp8+wpa81" />

Thanks