There are som issues at the moment with all IPTV.
IPTV Providers have been using the Xtream Code panel to distrube their services.
But latley alot of illegal distruners has also been using this panel for distrubing non legal IPTV
So the Xtream Code Panel was shutdown. Now it gets rebuild but it takes time so therfore all IPTV is very unstable at the moment.
So This is not a Jedi problem. Jedi just create a bouquet file just like the one you create when scanning channels with your Satellite tuners.
If reception is bad you channels flickers or freeze. Same with IPTV if the provider side is unstable channels freeze and behave like you describe.
You just have to be wait it out and hope your provider rebuild their panel fast so channels become stable again