Equity cloud sometimes shows spurious spikes

In both cTrader (Perfomance tab) and cMirror (Balance and Equity tab) there are some spikes which touch balance, but in reality, equity was not equal to the balance at that time. It is purely cosmetic.

Here is an example of that in cMirror.

Is it observed on hedged accounts which are most of the time in a state when there are sell and buy positions with the equal amount in the same direction.

Is it a known problem?