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Incident report
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    Resolution: Fixed
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Trivial
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    2.2.3, 2.2.4, 2.2.5, 2.2.6
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    Zabbix 2.2.2, Debian Wheezy, virtual machine (4vCPU, 10GB RAM, 100Mbit/s)
 
How to reproduce:
Mark 2 or more items
select "mass update" and go
add new flexible intervals
click update - zabbix display an information that items are updated
click on one of this updated item separately and flexible intervals it wasn't updated
Version of my Zabbix: 2.2.2, 
I found thread in zabbix forum that another people have the same issue. 
Here's the url: https://www.zabbix.com/forum/showthread.php?t=44038