I have The Dude 6.35.2 installed on CCR1016, and for some time all reading are correct (cpu and disk usage on mikrotiks, snmp readings of link throughtput...) and once every few minutes all that is lost, all readings are blank and it takes few minutes to repopulate, it will work for shot time before losing it all again, rinse and repeat.
Also when that happens I lose ping on some devices and after few moments it is restored.

On 3.6 Dude (on linux server) which also monitors my network all readings work without any problem, no drops in ping, no lost readings.

On Dude server (CCR1036) cpu usage is around 2%.