Mizuho Financial Group Inc. was hit by another system glitch, even as it prepared to appoint an insider as its next chief executive officer to steer Japan’s third-largest banking group back from a series of technical problems.

Core lending unit Mizuho Bank Ltd. said on Tuesday that it was having problems with its corporate internet banking system. While the glitch was later resolved, it came after a series of system disruptions in the past year which have prompted rebukes from regulators and forced current CEO Tatsufumi Sakai to announce in November that he would step down.

The bank is set to name career executive Masahiro Kihara as his successor at a board meeting on Monday, and he is due to take office on April 1, according to people with knowledge of the plans. They asked not to be identified as the matter wasn’t yet public.