Unstable routing on 3850 after installing 16.12.7

[Mohammad Nasir]

Hello,

after updating our WS-C3850-12S switches (used as router between four networks) to a vendor qualified version 16.12.7, right away the communication between the networks become unstable or unavailable at a time, issue later after couple of our on the day resolved without doing anything, and routing between networks become stable, are there known issues with the switch and this version? would the issue comes back?

[balaji.bandi]

what kind of routing? any IGP or static Routing ?

check the Logs any information?

[MHM Cisco World]

it can be routing loop, hard to answer this. 
what routing you run EIGRP OSPF or BGP?

[Mohammad Nasir]

Thanks gentelmen, they directly connected routes, I have attached logs if it helps identify the issue.

[MHM Cisco World]

only one think keep me think why there are multi track under HSRP standby ??