I encountered a weird problem with some components. Sometimes when I click on the specific component variant all property values are cleaned (without changing anything in them) and I get a warning about layer invalid name (or corrupted property values when I try to publish a library). When I look on the left panel with Layers, variant name looks perfectly fine but still I need to handle property values manually in the right panel.
I don’t know what are the steps to reproduce this issue. It happened several times with various components.

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