As moritz and MidLifeXis have both suggested, it looks like your key mappings may not be what you think/would like and changing them/it would appear to present the best solution to your problem.

The quick way to reset _all_ key mappings for the session is to use stty sane which, in most cases, will reset the mappings to, as it [the command argument] suggests, a 'reasonably' sane setting - use c> man stty</c> for further details.