step 1: have wireless transmitter in overworld with dimension upgrade and setup a network transmitter
step 2: setup import/export to a chest with a wireless receiver in another dimension and watch it function as it normally should
step 3: restart world and watch how it stops working after restarting, requiring you to replace the wireless transmitter in the overworld and place it again for the importers/exporters to function in the other dimension

This happens with refined storage version 1.11.6 which fixed these issues:
-Fixed not being able to search with JEI when the Grid is open.
-Fixed a bunch of issues where chunks would unintentionally be loaded by RS.
-Reduced block updates when a controller is turning on and off constantly.

But it seems to have broken the dimension upgrade whenever you restart the world. when restarting the world the importers and exporters in other dimensions will stop working until you break the wireless transmitter and replace it again.