Unable to receive calls on sim 2 after upgrading to marshmallow

[AC Question]

The "incoming call" screen is not displayed on my mobile when some one calls on sim2 in my mobile. the caller is able to hear my phone ringing but no incoming call screen displayed for me on my mobile. after the ring is complete, i am seeing a missed call notification on my mobile but the notification is displayed for sim1 (as such the caller called me on sim1).

 

[the tall guy]

Hi, and did this issue just start after updating to Marshmallow?