Component ID based on name in layout breaks when block is in subfolder

[mvenghaus]

There is a problem with the component id when it's based on $block->getNameInLayout().

When the block is in a subfolder and no name is set the id is generated.

Example:
Block: Folder\BlockName
Generated ID: "folder\blockname_0"
Magewire URL: /magewire/post/livewire/message/folder/blockname_0

This leads to 2 request params where one of them is a root param like "fingerprint" .. and then the name on a subsequent requst is wrong and the requst param validation failed.

Possible Solution:
Wrap all usages of getNameInLayout and replace \ with __ for example.