Dataflows Refreshment is not working multiple failure log

I’ve set up several dataflows in Power BI, scheduled to refresh every 30 minutes in sequence. The data source is AWS Redshift.

We’ve been experiencing frequent failures due to Redshift’s cold start issue. To mitigate this, I created dummy dataflows at the beginning of the refresh chain to warm up Redshift before the actual queries run  and that workaround is working for now.

However, we’re still seeing occasional failures that aren’t consistent day to day. The error logs point to multiple potential causes. The gateway team has already increased capacity, so I’m trying to understand what else might be contributing to these failures.

What additional checks or configurations can I explore to prevent the error shown below? Any suggestions on how to further stabilize the refresh process would be appreciated.