Yes, I get these spikes too, as shown in attached plot, which shows three that occurred over a few minutes.
I’ve been looking at how to eliminate the spikes.
The trouble is that they are persist over several seconds and their energy is spread over a wide frequency band. Also, they are not too dissimilar from EQ waves, though the human eye (a superb instrument) can distinguish them quite easily.
The shape of the spikes is quite similar to Daubechies-type mother wavelets and I’ve been trying to use OWT (orthogonal wavelet transformation) to isolate them, so far without success.
In the meantime, I’ve found that eye-ometer followed by excision is the best method.