Client Disconnected Error in Cloudflare

Hi Cloudflare community, I’m relatively new to cloudflare workers and its usage my question is this part of worker logs. Can someone explain what this means.

The reason for this query is that around 10PM Nov 24, 2023 up to 1AM Nov 25, 2023, all our portal sites are being slow. So is their a particular reason why is this the case? Is their something happening to the cloudflare worker?

Thanks in advance.