EAD based on Past Employer 485 filing

[gkbandi]

Hi,

I am working with current employer from July 2019 on H1b status.

My previous employer filed 485 for me on 23^rd October, 2020 based on future employment basis and I have received EAD on 13^th July, 2021 as well as my action date(priority date) is not current yet.

Meanwhile my current employer had to file my H1b extension and it got approved on 29^th September, 2021 and validity starts from 5^th December, 2021. FYI, This extension is filed after I received EAD.

Is it legally valid, if I would like to join with completely different employer by using EAD? if it is valid then do I need to report back to original employer who filed my 485 when I receive GC in future?