Autoforward not working with big channels with lots of subscribers.

[Navneet-Choudhary]

Issue - When I setup simple connection for just newly created test channel to forward to another channel - it works fine. When I try to set it up for some real world channels with lots of subscriber whivh I use every day - it doen't see (and forward) new messages.

I also noticed that my telegram message is delayed for that source account and loads messages when I open the group chat

[ShamanValius]

It looks like #581