Synchronized Security and Security Heartbeat - high CPU consumption

Hi everyone,
Yesterday I upgraded SFOS from version 16.05 MR7 to v17 beta at home SG115w. The whole process went without any problems.
After installation, I created a SOPHOS Central account and started synchronizing home endpoints. After installing the third computer, I noticed that the processor utilization is between 60-80% (with three computers connected) and the 'performance' icon is orange.
Second thing: when the Synchronized Security and Heartbeat options were turned off, the CPU usage went down slightly, but still very high. After returning to version 16.05 MR7 also did not decrease even though I even restored the file with the previous configuration.

Have you met a similar problem?