Search Test Executions intermittent issue: headers, but no contents

Hi all

We are experiencing an intermittent issue with Search Test Executions using Zephyr Squad

Occasionally, a user will run this and get headers, but no content

This is not confined to any particular user or browser (we use Chrome, Edge & Opera and have tried soft and hard refreshes)

It happens for different users at different times - usually for short periods for an individual user (maybe 10-30 mins) and when the user tries again later it seems to function correctly again.

10 users at the moment, but not necessarily hitting the page at the same time.

Anyone experiencing the same, or have a solution?

Thanks

Graham