Assembly Ritual has no effect if used twice on the same defence.
Heart of Gold, level 3. After killing the Duke's Son, level 10 hero reinforcements began pouring through the gateways. The remaining two gateways are cut off entirely, yet hero reinforcements continued to pour through on a short timed interval. Digging into the outpost results in an outpour of some 80+ heroes, most of which are level 10, far too many for standard creatures and defences to beat.
That's irrelevant though.
I placed the blueprints for a horde of sentinels (defense structure, 10 parts each) and queued the Assembly Ritual (adds 5 parts to all defences). It worked as normal. However, any further Assembly rituals do nothing.
I'm not entirely sure if this is a bug or an intended feature. If you place new defences, the Assembly will add parts to them, which shows the rituals are definitely still working; they just don't want to work twice on the same defence.
Hey woudo,
This was probably caused by our attempt to limit it to 5 pieces per cast. We'll look to fix this soon