Hi! probably it is due to the fact that we used a 0,7mm nozzle and Slider calculates infill on this nozzle size.
If your machine mounts another nozzle just make some tries to find the correct infil settings to let water pass through the plate ;)
hint: in Slicer's advanced settings you can increase infill line width. Another solution is to deceive your machine by setting an oversized nozzle compared to real one (if you have a 0,4 write 0,7 for example): this will increase flowrate and infill pattern will be calculated on that dimension