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likaixuan
61c9e803f1
Anchored panels resolve their portal host by name. Several screens can mount a host under the same name, but the registry kept only the newest element: when that element unmounted, its cleanup deleted the entry, and the surviving host was no longer measurable. Every anchored panel then returned null with no error and no log, until something remounted the screen or reloaded the window. Track all hosts per name and measure the newest laid-out one, so unmounting a host only removes that host. Measurement now skips hosts that report no size, which covers retained copies that are still mounted but not laid out.