What Prusaslicer settings can I change to prevent small objects of a print from failing to print correctly?  

What Prusaslicer settings can I change to prevent small objects of a print from failing to print correctly?

After 5 very successful years printing with Prusament, Fillamentum and recently Buddy filaments on my original Prusa Mini, I have been trying Sunlu Matte PLA filament as I like the muted colours. I have no problems with bed adhesion, or even the printing of such models as articulated dragons etc. BUT where prints always fail is when the area being printed is very small e.g. the top half of the cabin of a benchy, where the four columns are being printed in quick succession. These small areas always lead to failure, with lack of adhesion of layers and an apparent blockage of the nozzle.  I am not sure if it is the very short layer printing time, too much or too little cooling of the layer or what?   The general settings in the Prusaslicer seems to be ok for a larger print where each layer takes a longer time to print, but it doesn't seem to cope with small/short layer print times.  Can anyone give me any guidance as to which setting(s) I might try to alter to allow the prints to finish correctly.  The lower part of the Sunlu benchy is some of the best printing quality I have had with any filament make.