Numeric literal in value property of input element: Is this syntax highlighting correct, or is it a bug?

WebStorm 2020.2.3
Build #WS-202.7660.23, built on September 30, 2020
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Runtime version: 11.0.8+10-b944.34 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 10 10.0
GC: ParNew, ConcurrentMarkSweep
Memory: 1979M
Cores: 16