issue has been identified with the 2.4.0 version of Designer, causing MTPCs to
reset when idle. We believe this is caused by the activation of the proximity
sensor when the backlight turns off after a period of inactivity. An updated
software version with a fix will be released as soon as possible. In the
meantime, please work around the issue by disabling proximity detection on your
TPC - deselect the "Wake screen on proximity detection" option in the
TPC's Screen properties.