Sometimes too many navigation arrows are shown

Software version: 21.22.

When loading a course on the FR955, sometimes I get too many arrows on the map. Compare the two screenshots below, where the first one shows correctly the arrows only for the coming distance. The second screenshot, which I made litterally a few seconds later, shows arrows everywhere. In that case, it's impossible to see what next road or turn to take. Is this a bug? Or is there some setting that I should change so that I only get arrows for the next 100m or so. During the entire course, the arrows on the map change between those two scenarios many times. 

Above: Arrows only shown for the road ahead, clear to see which road or turn to take. 

Above: Arrows all over the place. It's impossible to see which road or turn to take.