Traversable END_GATEWAY blocks will return if broken from within the iris of a protected A gate. This is intended.

Unfortunately, the END_GATEWAYS are not the only things that return;
Their purple beacon things return as well.

Is there any way we can make sure that those things stay suppressed?

If the problem is that they are kind of refreshed when the blocks are broken, but the block break event is cancelled, we could listen for a cancelled block break event related to END_GATEWAY inside a portal iris and re-apply the age.

I can not replicate this on 1.18.2, or 1.15. I can only replicate this on 1.19 instances (craftbukkit, spigot, paper). My bet is that this is a craftbukkit 1.19 related issue

SPIGOT-7076