Timespan node broken?

I’m trying to use some Timespan nodes, but they seem to be broken.

Here is both the make Timespan and DateTime nodes:

https://forums.unrealengine.com/attachment.php?attachmentid=48078&d=1436973056

The documentation says these nodes can create a Timespan / Datetime from their members, but unlike other ‘make’ nodes it has no inputs for actually making an output.

If I bring in a Timespan variable node, and try to split the struct into its constituent members, it just disappears leaving a totally blank node:

https://forums.unrealengine.com/attachment.php?attachmentid=48079&d=1436973196

Similarly, on a Media Player ‘Seek’ node, when I try to split the input so that I can specify just the seconds, for example, the input port just disappears:

https://forums.unrealengine.com/attachment.php?attachmentid=48080&d=1436973325

This seems like a bug, and I can’t find any work around. I really need to be able to use Timespans.

I’m using the latest version (4.8.1) on Mac OSX 10.10.3