On CIC website, it also states that if duration on LMIA is indeterminate or permanent they will only issue a work permit for 2 years:
Duration of work permit where the duration of the LMIA is “Indeterminate/Permanent”
In the Job Details section under the Employment Detail – LMIA view tab in GCMS, the Duration field will indicate a specific duration or “indeterminate/permanent” period.
Work permits supported by a permanent duration LMIA will be issued for a maximum period of two years, provided the foreign national meets the requirements set out in the LMIA. Such work permits will not be extended, regardless of whether the permanent residence application is still in process.