Submaster page change

I often use sub-masters on a Fullboar 4, when I change the page the sub-master release.
preferences are:
Holdover if active - ON
Remember intensity values - ON

for example:
Active sunstrips as a HTP Master at 100%
the group Active suns Sub-master at 50%
if I chanche page then the sub-master release and the sunstrips go to 100%

Does anyone know how to change it so that the Sub-master don't release or is this a bug?