Apps can only be downloaded/installed after reopening Play Store? topic

I have rooted my Note 4 and there comes a problem with downloading and installing. I have to close Play Store so that it would download/install the app. If I have to update 6 apps, I have to close and open Play Store 12 times...

I have tried to clear all data of Play Store and clear cache of Play Service; and I've also uninstall Play Store and it was the same case with lower version.

Many thanks for your help in advance!!! :D