I have an assembly containing several limit distance mates. Everything works as expected except sometimes when dragging a group of parts the movement stops even though the limit is not reached. If I repeat the dragging it sometimes moves a little further and if I persevere I can eventually reach the limit. This problem happens near the limits and not in the middle of the range.  I upgraded  to a much more powerful PC (i7 instead of i3 and 64GB instead of 16GB) which reduced the problem but not by much. Do others have this issue? Can anyone offer a solution?