I determined BUG.
Bug occurs when you run this script
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var json = api('getSource', {type: "json"});
api('applySource', {source: json, createNew: !true});
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or in "EasyEda File Source" click to Apply button,
**If the PCB zoom is 1000% or more**.If the PCB zoom is 750% less, then there are no errors!
Please fix it!
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
