The new Mtroniks Tio range of speed controllers don't have this issue, but the earlier Vipers do. It gets a mention on Mtroniks own site. The problem usually only manifests itself if using two controllers via a mixer. Then on two of the extremes of travel, for example full throttle and full left, the units would exceed their 'range' and stop working. Nothing you can do about it, it is in their software.
It can also show up on a small number of transmitters that have greater than normal travel from end to end on their sticks. Nothing current that I can remember, but sets of about ten to twelve years old, brands I cannot remember either ( getting old, or not caring any more, one or t'other!).
The third way it can occur is if the potentiometer in the transmitter stick has started to physically drift out of its as produced position. This does not affect servos, but can bother some speed control brands. Easily fixed with a quick tweak of the pots position in the set, followed with a dab of glue to stop it moving. Acoms, Hitec and some Futaba 2 channels used to do this..also easily fixed by throwing them out the window and buying a new set, but I digress