Looking at the code in ContainerLayer::PrerollChildren, there are 2 flags that are accumulated on a subtree basis: has_platform_layer and has_texture_layer. The has_platform_layer flag appears to be accumulated within a subtree but only affects parents and ancestors. The has_texture_layer flag, however, is only ever set and never reset so once a layer is encountered it leads all future layers, including its siblings, its downstream cousins, and the entire tree that is visited after it to believe that they are part of a subtree that contains a TextureLayer.

The logic should be updated to match how has_platform_layer is accumulated.

Relevant source code: https://github.com/flutter/engine/blob/0b46116471cc0ad4bb5a4d2fa80a49061d1d4b0d/flow/layers/container_layer.cc#L136

The logic was introduced in flutter/engine#23793