A Chain Command Block performs "Always Active" if placed by default, but it doesn't seem to be active when turned into Repeating mode from the GUI. Only re-activation makes it work. It's really not like what I expected. Hope you can fix this issue soon.

Steps to reproduce:

1. /give @p minecraft:chain_command_block
2. Place and right-click the chain command block, observe that it is set to "Always Active" as opposed to "Needs Redstone"
4. Enter a command, such as /say hi
5. Change the command block's mode to "Repeat"
6. Hit "Done"
7. Observe that the command block does not start printing "hi" in the chat