[Q] Certain apps require to be updated again.

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http://forum.xda-developers.com – I'm rooted on LRQ (hydracore kernel). After I upgraded, I restored all possible apps using Titanium backup. Now, after sometime, my phone shows that few apps require update on play store and I do the update (even though were already on latest version). After few days, the phone again asks for the apps to be updated (the same update versions as before). Why is this happening? It's happening only on select apps like maps, whatsapp, mx player and so on. Any help would be appreciated. thanks a lot. (HowTos)