There is a regression in BB10 10.2.1 notification API which prevents Taki from processing call Answer / Reject choice when Taki is running in the background and receives inbound call. In this case notification dialog pops up, but user choice is not properly delivered to Taki process.
We have ticket open in BlackBerry Bug tracker: https://www.blackberry.com/jira/browse/BBTEN-2166 and you can follow the progress there.
After it’ll be fixed you won’t need to focus Taki to answer/reject the call.
This post will be updated when more information becomes available. Thanks for letting us know about this issue!
This issue was escalated to Blackberry internal NDK team and added the MKS DevTask ID: 633214.