Hi Simon, thank you for asking, I have the same question as well.
In fact, with the EAs, I made around 10% from April-July’19, and from Aug-Nov, it went -15%.
I have removed strategies with low profit factor and swapped with newly generated strategies (timeline 2014-2019).
Still doesn’t seem to be improving.
Wondering if anyone has had a bumpy Aug-Nov (likely Dec)?
How did you manage to get out of it?