I’ve loaded your .3mf file into Bambu Studio and took a look at the speeds. As you can see, if you are printing 10 clones, the printing speed goes up to around 200 mm/s:
And if you only are printing 2 clones, the printing speed is around 50 mm/s:
I think, the simple way is, to slow down the speed for outer wall, inner wall and sparse infill to 50 mm/s and test if it works.
The other way could be, to find the optimal settings for the filament, for example the retraction settings maybe optimized or temperatures.
Also a point for PETG can be moisture: Am I Experiencing A PETG Issue - What causes this? - #13 by print.in.3d