Can get the documents UI page to hang displaying 'Rendering results...'

Can consistently get the document UI page into the hung state shown in the attached screenshot, stuck displaying 'Rendering results...', in the latest 5.5 beta (build 2907). Also attached screenshot of the console output (only the last line, from angular, is shown in the error case - I see the first three errors in good cases too).

Also attaching a screenshot of my docs just before I do the operation which triggers this, which is to update document Andy to the following:

{"__cb_txn::id":"__cb_txn_id::txnid","__cb_txn::state":"Active","value":5,"__cb_txn::disposalExpirationTime":1529660830434}

This happens every time I run the test.

Let me know if there's any further info I can provide.