They've had a whole series of scandals, it is one of the worst employers in Europe and some of the stuff they do is just incredible. Some of them are more pressworthy than others but Lidl never really stopped.
https://en.wikipedia.org/wiki/Lidl#Working_conditions_and_la...
Of course misconduct of management would happen 'in one particular warehouse or shop', where else would it happen? Lidl consists of corporate, warehouses and shops. Most opportunities for abuse will be present in the latter two.
As for the spying scandal: the same board that condoned that still runs the company today, they conveniently scape-goated one individual and threw him under the bus but just like other scandals involving multi-nationals the real perps typically stay out of the firing line.
Lidl paid a 1.5 million euro fine, which is a pittance and their exec a nice golden parachute, who by the way now has a nice little thing going as a high flying consultant: