Wireshark only capturing broadcast packages

Question

I've ran Wireshark multiple times on my notebook for wireless networks verifying mobile packages for my devices and it used to work most of the time.

I haven't been able to monitor my traffic today on three different networks - my home router and two mobile wifi routers at home too.

Before I used to run Wireshark on my Fedora, put wlan0 in monitor mode and get access to all network packages, filter TCP and do my work.

What I tried today is:

1. Run wlan0 in Wireshark in monitor mode - disconnecting after 30 seconds - reading a bit seems like this is normal, even though it used to work for me before.
2. Bring ifconfig wlan0 down and airmon-ng start wlan0 which creates a mon0 monitor
3. Try capturing packages from mon0 or wlan0, both only in monitor mode or monitor + promiscuous mode together
4. I tried starting a monitor on a specific channel based on other suggestions from experienced users, but doesn't seem to work.
5. I ran different monitors (up to mon6) with different configuration settings from Wireshark, but the output was the same.

In all instances I only get access to beacons, and no TCP packages or any other relevant network information that I need. And for confirmation, the WiFi card support monitoring since I've done that a dozen times before on the same machine.

I ruled out my personal WiFi at home since I tried with two different networks as well, and I've restarted my system twice to ensure that I haven't permanently turned off some wlan0 mode or feature. I assume that the router may be running as a WiFi hub or something else that doesn't broadcast TCP data, but I'm most likely wrong.

Is there any obvious reasons why I only see a broadcast traffic?