Not automatically. Have the actual qualifying employment chronology and applicable timeframe assessed. A residence change alone does not determine which period counts. Two dates do the work: when the continuous qualifying year ended, and when the filing is intended. The window is measured between them, so a delay in filing moves the window and can leave an otherwise complete year outside it. Arrival in Canada is not one of the two.
Separate relocation dates from employment facts
Identify changes of employer, duties and physical work location, including U.S. periods where relevant. Plan the proposed transfer using the reviewed history rather than the date of arrival in Canada alone.
Draw the history as a line before drawing conclusions from it. Mark employer changes, duty changes, physical work locations and any periods spent in the United States, then mark the intended filing date and see which employment falls inside the window measured from there. Maximum stay in L-1B status is generally five years, which matters at the planning stage rather than at the end: a project expected to need the person for longer should be discussed with counsel before the first period is requested.
Where the United States work would be performed at another company's site, further conditions apply to that placement and the arrangement should be reviewed on its actual terms. Set the review points in the corporate calendar against the granted end date, never the requested one.