For review in 2018.

Can you provide a screenshot? I'm pretty sure that this is working as intended if the issue is with the chasm edge overflow tiles, these tiles are specifically meant to be used in conjunction with a water/lava fall and as such have some placement requirements to make them look correct. It's not ideal but is a result of limitations in the tiling system of the game.

Overflow tiles are missing an edge which would normally be present and this allows the lava/water fall to display without clipping through that edge the VFX of the falling water/lava hides the missing edge but if you place one of these tiles without a fall then the illusion is broken.

Thanks and nice spot, straight through with this one.

This is a known issue and should be resolved internally awaiting testing in the new year.

For review in 2018. I'm not sure there's ever been a notification for this as it happens very often and they are expendable. Will require some design insight when we're back in the office.

For review in 2018.

As Nutter has quite rightly identified this is intended behaviour and not a bug, the Incantation ritual will complete the channeling part of any ritual but not any additional requirements (such as the sacrifice here) I would agree that this is not appropriately telegraphed however and I feel this is a problem with the Vampire ritual more than anything. I'll put it in review so we can discuss design in 2018 but there's only a remote chance changes will be made to this, it all depends if we can afford the resources to do something about it.

One for review in 2018

I'm pretty confident this is working as intended. Map Makers are able to assign a random weighting quality to an artefact so it will appear differently when researched, this is only rolled when the artefact is actually researched so if they apply a 1-1 weighting between 2 artefacts there's a 50:50 chance of receiving one of either type.

Just to confirm is the Artefact in question sitting in your archive un-researched before the save and thus completes after the save each time? I can't review the savegame at this time as we're not in the office until the new year.