m.top.nextPanel causes device restart

m.top.nextPanel = nextPanel

setting nextPanel causes the device to restart
model: 4200X 048.10E04131A

Parent panel extends ListPanel, Child (nextPanel) extends Panel, but adding the “nextPanel” to the panelSet directly works just fine like this:

' m.panelSet is an instance of: https://sdkdocs.roku.com/display/sdkdoc/PanelSet
m.panelSet.AppendChild(nextPanel)
m.panelSet.ReplaceChild(nextPanel, INDEX)

Has anyone else encountered this, I’m curious if there are other workarounds ?

It looks like it’s reproducible only on this device/model

Seems to be related to the 8.1 firmware update