Flow Usually Works ----- But Sometimes Thinks CSV content is null, and errors

[TomTomTom]

Greetings. I have a flow that when a CSV is created in a folder, loops over each line to create a word document (one word doc per csv line). It is mostly succeeding in live - but occasionally PowerAutomate tells me the CSV has no content - is Null - and it fails. This is wrong, the CSV does have content - and when I resubmit the CSV to retrigger the flow, it works then as expected.

Any ideas? 

Here are some screenshots.

The error message.

 The predecessor step showing nothing (erroneously).

This is definitely a problem with the trigger, as the successful runs shows the File Content, but in the failure it is completely absent.

The flow as a whole (loop section not expanded). Note that experienced the same failure once in test, but thought the 5 minute delay would probably fix it.