ZOHO Android app goes black and freezes

ZOHO Android app goes black and freezes

My ZOHO mail frequently goes "black" requiring it to be uninstalled then reinstalled. The new reinstalled applications works well for a couple days then it goes black again and will not work requiring another uninstall and reinstall. The problem seems to occur once I have accessed the application and read several emails. After a while when I click on a mail to read it goes black and needs to be reinstalled. I have tried just exiting and restarting my cell phone but that does not work either. The first time it happened I received a Facebook notice and clicked on the mail to link to Facebook and it went black. Now it seems to happen all the time. Please help.

jckosta@zoho.com
626-543-3528