10.0.3 "Sophos Network Extension" process using 150% CPU

My computer updated to macOS 11.2.1 yesterday and everything seemed fine, then Sophos updated from 10.0.2 to 10.0.3 early this morning. Since the Sophos update, my computer has been experiencing random network data loss. For instance, Microsoft Teams keeps disconnecting, web pages fail to load, etc. These usually only last less than 10 seconds each, but their frequency creates a very high level of frustration.

I noticed that for very long stretches of time (20minutes or more), the Sophos Network Extension is running at 150% CPU usage.

I have all of the components configured to start and I have been running the EAP successfully since the beginning of the program. Today, I had to remove it. The network stability blips and the increased laptop fan usage caused by the high cpu process was too much.

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  • I can confirm the exact situation at my end where Sophos is clashing with Zscaler ZPA (VPN like connection). On the previous version, the Web Network Extension was not enabled by restarts but since 10.0.3 we are in this situation... I had to provide my colleagues with the protection passwords so they can uninstall and then re-install back without the culprit. You can imagine the fun and comments on this.....