An applicant whose PGWP was initially rejected then later approved on reconsideration had taken about a month of unpaid leave during the gap (since working without a valid PGWP would have been illegal). They asked how to record this in the personal history section of their EE profile.
The direct guidance from the thread: list the period as "unemployment" in your personal history, and you do not need to add a lengthy explanation for it. A short, factual entry is sufficient — personal history sections generally just need an accurate account of each period of your life (employed, unemployed, studying, etc.), not a justification for why you were unemployed.
If your paystub or payroll records show a mismatched date range for the leave (as happened in this case, where the paystub showed different dates than the actual leave), it's worth keeping documentation of the discrepancy on hand in case IRCC follows up, but the personal history entry itself can remain a simple "unemployment" listing for the relevant weeks.