variable.attack_time fails with Cod runtime ID

I am trying to add an attack animation to my hostile fish mob, but I'm finding that variable.attack_time is not defined when using the cod runtime id. Without the cod runtime_id, my fish flies into space.

 

This seems similar to MCPE-110042

In the logs I get this error:

Error: unhandled request for unknown variable 'variable.attack_time'

 

The error goes away if I use a different runtime identifier such as minecraft:guardian.