Problems with weird large slow retractions during print

[JamestKirkup 0]

I recently upgraded my ender 3 to a micro swiss all-metal hot end - starting to regret it! I am aware that all-metal hot ends are suseptable to heat creep so I made sure my fan ducting and stuff was all dialled in.

 

I still get clogs though, like a lot, its not my extruder and I'm using cura to slice my models. Nozzle is also brand new and clear. What I've heard is that large retractions are a big issue with all metal hot ends, so I dialled it right back to 3mm 

 

Still got clogs!!

 

So...I kept trying prints and noticed something weird, while watching the printer like a hawk sure enough it clogged up and the extruder started slipping, and then I saw it retracting around 30mm at a rate of about 15mm/s or so, it then did a travel move, undid the retraction and kept printing.  I've seen this happen twice now but for the rest of the print it just does the normal 3mm of retraction i told it to.

 

I am totally stuck on this one, please help!