increased CPU use (20-99%) on mikrotik

RouterOS General
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increased CPU use (20-99%) on mikrotik, in what could be the problem?

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Tool / Profile

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What device ?
What ROS version ?

I’ve seen it happening with 7.2rc1 on mAP Lite, went back to 7.1.1 and problem went away.

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I’ve seen it on RB5009 running 7.2rc1 , therefore running again 7.1.1 now which does not exhibit this.