I need some help

I installed TWD Season 1 on both my Android tablet and Android cell phone. However, to play on my phone, I would have to start the game over from the beginning, even tho I sign into my account on both devices. Is there any way to link my account so that the progress from my tablet transfers to my phone? I do have Google Play Games installed on both devices. I tried to access the game through there thinking maybe that would help, but... no luck.
Can anyone help me with this?

Thank you!

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