FR/UK or any other language except en brings `Invalid date format` errors for Reporting page

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The errors appears only for non EN languages, where there are some translations for the reporting page.
Probably for Start and End text in card.

My quick investigations:
I checked console message for getDateFromString(timestamp: string, timezone?: string): Date {
params are:
Date invalide America/Los_Angeles

I've checked legendFormatter = (legend: dygraphs.LegendData): string => {
x there is undefined.

Then, I checked:
this.reportsService.legendEventEmitterObs$.pipe(untilDestroyed(this)).subscribe({

and it depends on that x, here it has: clone.xHTML = this.formatTime(data.x);