console logging nativeFontFaces in pdfDocument returns undefined - pdf

Question

Currently creating a project with pdf viewing using pdfjs library.
Version Used: "pdfjs-dist": "2.2.228".
I had pdfs with "corrupted" fonts and not loading text on pdf.
I wanted to catch when font has problems but had the following problem where I cannot access the object that indicated font error.
const loadingTask = getDocument({
cMapPacked: true,
cMapUrl: `${window['srcUrl']}assets/cmaps/`,
url,
});
loadingTask.promise.then(pdfDocument => {
pdfDocument.getData().then((data) => {
this.pdfBlob = new Blob([data], { type: 'application/pdf' });
this.pdfBlobUrl = window.URL.createObjectURL(this.pdfBlob);
this.emit('file-blob-created', this.pdfBlob, this.pdfBlobUrl);
});
this.pdfDocument = pdfDocument;
this.pdfViewer.setDocument(pdfDocument);
console.log("log1", this.pdfDocument._transport.fontLoader);
console.log("log2", this.pdfDocument._transport.fontLoader.nativeFontFaces);
console.log("log3", this.pdfDocument._transport.fontLoader.nativeFontFaces[0]);
console.log("ERROR FONT: ", this.pdfDocument._transport.fontLoader.nativeFontFaces.some(i => i.status === "error"))
log1 returns the following
GenericFontLoader {docId: 'd0', nativeFontFaces: Array(0), styleElement: null, loadingContext: {…}, _onUnsupportedFeature: ƒ, …}
docId: "d0"
isFontLoadingAPISupported: true
loadTestFontId: 0
loadingContext: {requests: Array(0), nextRequestId: 0}
nativeFontFaces: Array(3)
0: FontFace
ascentOverride: "normal"
descentOverride: "normal"
display: "auto"
family: "g_d0_f1"
featureSettings: "normal"
lineGapOverride: "normal"
loaded: (...)
sizeAdjust: "100%"
status: "error"
stretch: "normal"
style: "normal"
unicodeRange: "U+0-10FFFF"
variant: "normal"
weight: "normal"
[[Prototype]]: FontFace
1: FontFace {family: 'g_d0_f2', style: 'normal', weight: 'normal', stretch: 'normal', unicodeRange: 'U+0-10FFFF', …}
2: FontFace {family: 'g_d0_f3', style: 'normal', weight: 'normal', stretch: 'normal', unicodeRange: 'U+0-10FFFF', …}
length: 3
[[Prototype]]: Array(0)
styleElement: null
_onUnsupportedFeature: ƒ ()
isSyncFontLoadingSupported: (...)
_loadTestFont: (...)
[[Prototype]]: BaseFontLoader
However log2 returns [] and log3 returns undefined.
Why does this happen?
I want to be able to access status in FontFaces to show alert when status is error (status: "error").