When attempting to start updating my server command blocks for the release of 1.9 the chain option would not chain only one command block after the initial one would trigger
Steps to Reproduce:
1. make a command block chain like always (using tellraw or tell) with the starting impulse block being a title command block
2.power the impulse command block
Are the other command blocks powered? You can either power them from the interface or by powering them with classic redstone, for example by placing redstone blocks next to them.