Female employees at UBS Group AG have criticized the Swiss bank for long-term cuts in their bonuses over maternity leave, the Financial Times reported, citing several current and former staff.

UBS reportedly reduced the annual bonuses of female employees who took seven months maternity leave offered to new mothers, but did not restore it to the original level when they returned to work.

Some women have left the bank in frustration, according to the March 11 report, and more than a dozen in the wealth management unit have complained about the manner in which they have been treated.