Hello together

I have several problems with the Omada C300 controller. My equipment looks like this:

• TL-ER7206 v1.0 as a gateway
• Two TL-SG3428 v2.0 switches in different rooms

All devices have the latest available firmware installed.

I have the following problems with the devices:

• Again and again disconnect from different devices, which are connected via cable to the switch.
• DHCP server does not work for some VLANs
• The Omada C300 controller can not connect to the Internet in some cases.
• Various display errors in the Omanda console (wrong display of ports etc.)
• Some widgets on the Omada controller just don't work (VPN Connections as an example)
• The view under Maps is partly totally wrong and does not correspond to the actual configuration.
• Devices under the menu item "Devices" disappear
• Internet Speed test does not work

etc.

Unfortunately I am not satisfied with the quality of the Omada SDN at all. 

Can anyone help me?

Greetings
Martin