HSRP Question 2 core 6513 connected with trunk gig port

i have problem and wish to help me , i have 2 core 6513 connected with trunk gig port .
suddenly the HSRP changed from standby to active on the standby switch and cause the network to freeze from about 30sec .
after while the HSRP revert back to it's original status , i have check the log and didn't able to define the root cause for the problem .
Attached the log for both of them , and i can share the show-tech if needed .

Post your HSRP configs for each vlan interface to see. Are you tracking any interfaces for any Standby groups? Could you have lost connection temporarily between the switches? Check the interface statistics for the link between the switches.

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HSRP Question 2 core 6513 connected with trunk gig port

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