Why mine detonators generally caused fewer problems than torpedo pistols

Did sea mines suffer the same detonation problems as the torpedoes used by different countries?

Generally less so: mines used older arrangements or a stable position, while moving torpedoes made influence detonation more complicated.

Mines generally relied on older, simpler arrangements than the troublesome torpedo detonators discussed here. Many torpedo programmes pursued magnetic influence pistols intended to explode beneath a ship, damage its bottom, and break its keel. Contact mines avoided that complication, while an influence mine at least operated from a comparatively stable position. A moving torpedo combined the detonator problem with the demands of travelling underwater. The terminology also changed over time: weapons originally called torpedoes included mines, before the self-propelled Whitehead type established the modern meaning.