New power query table loaded to data model not visible in Pivot Table fields window

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Per the title, I can see the added table in the Measure Edit window, and I can see it in the Power Pivot window, I can create a measure that accesses it's columns, but I can't see the table or the measure in the PivotTable Fields window, even if I select ALL.

Has anyone else seen this type of behaviour?
How can I fix it?
Is it common for Power Pivot to be unstable like this?

 

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Work-around is to delete the table and create it again in power query.

Also, if I try to refresh while I have Power Pivot window open for another excel document, I get an error that is as meaningful as: excel failed not to fail

Add a calculated column and refresh and *presto* nowhere to be seen in the PivotTable window.

 

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So then I have the pleasure of re-building the model from scratch except half the tables don't load into the data model even though I specifically check that box

So then I close and re-open the clown of a thing and the tables are there in the model. At this point I am walking on egg shells...