Alembic animation works in 4.18 but not in 4.20!

I import alembics as skeletal mesh , same file works in 4.18.3 but in 4.20.1 , the morph targets keys are there but when played in view port or sequencer there is no animation , even the file that is working in 4.18.3 if i migrate it to 4.20.1 project it doesnt work ?! , I need help my project is on hold :frowning: .

Hello,

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Thanks