Null labelName for many subdomains

[graemecode]

Hi there,

I was investigating the issue with the labelName being null for some subdomains and I came across the code responsible in the ensRegistry.ts file. It appears to be happening in lines 53 to 56 in the fbddf98 version.

ens-subgraph/src/ensRegistry.ts

Lines 53 to 56 in fbddf98

	let label = ens.nameByHash(event.params.label.toHexString())
	if (label != null) {
	domain.labelName = label
	}

I was wondering if this is a known issue and if there is anything that can be done to fix it. I've included some examples below.

Please let me know if you have any thoughts or insights on this matter.

Examples

LabelName is null

LabelName is correct

[graemecode]

Perhaps this is related to this issue #59