When we run task in Superlab 4.5, frequently the first screen has a bug if we leave it on the screen for more than a few seconds. It looks like the middle of the screen disappears, removing all stimuli and text that are within the center of the screen. It is about half the screen that disappears, always a box in the middle.
For example, the first screen presented says “Press spacebar to begin” in black text that appears on a single line and takes up most of the width of the monitor. After a few seconds, without pressing any keys, the middle disappears so now it looks like this:
[underline added b/c this thread removes extra spaces]
It does this most but not all of the time. We thought it only occurred the first time we ran a task after opening Superlab, but it happens more frequently than that. Probably about 50% of the tasks we ran today had this happen. It seems to be limited to the first event presented (typically our “Press spacebar to begin” screen), but also seems to happen on other screens intermittently when nothing is pressed after a few seconds.