SUMMARY
I'm using a desktop widget that needs network (comics strip downloader) and also I'm using a desktop background theme that downloads pics from internet (astronomy pic of the day). When network is ready at startup (i.e. wired connection) everything works as expected; however if the network is started later (say because wlan requires auth credentials) comics widget never gets updated and the spinner is shown forever, even if the network becomes available (not even cached images are shown). Also background is not updated. To update the widget it I have to run "kquitapp5 plasmashell ; kstart5 plasmashell" after network is available.


STEPS TO REPRODUCE
1. Start kde without network connection and comics strip widget on screen
2. Check that widget is not updated
3. restart plasmashell
4. check that widget is updated.
OBSERVED RESULT
Widget not updated

EXPECTED RESULT
widget updated once network is ready 

SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma: Linux 4.20.6 
(available in About System)
KDE Plasma Version: 5.14.90
KDE Frameworks Version: 5.54.0
Qt Version: 5.11.3

ADDITIONAL INFORMATION
The issue is not limited to last (5.14.90) plasmashell but happens since several versions.