Strange behavior of PCD8544 on Win

One of my student group developed a small game which uses the PCD8544 in Simulide. In the newer Simulide versions on Windows (e.g. 0.4.14-RC4) the display looks like mixing up the lines:



In an older version (0.3.12-SR8) it looks much better



Weirdly, the problem only appears on distinct power settings of Windows on the students PC, but always on mine

Changes in Simulide (Speed, ReactStep, NoLinAcc) seem not to change the situation.

I can confirm that this issue also happens in Linux.

It is related to changes introduced in version 14-RC2.

I'm investigating the issue right now.