Hi, I took a look at the sample but it doesn't match what I'm seeing.
I have a page w/ an SfTab (this is the first page the app shows at start up)
A button on the SfTab triggers a navigation to a Xamarin.Forms standard TabPage (not sftab)
From there click around on the tabs for a minute, and then have a button in one of the TabPages that take you back to the original Page w/ the SfTab.
When the app returns to the SfTab is when the crash occurs.
Again, this only started happening in .52 (and .53) this did not occur in 48.
Thanks,
Rich