1.96 and 3.96 share the same basic design. Finishing standards are different and 1.96 had the Geneva Seal. Have not heard much about 3.96 problems though.
Even when the problem existed, only very proportions of units were affected. All LUC automatic movements have the silent rectification (even if not affected) at regular servicing, without extra charge. More reason to send those LUC for regular servicing