I had the same thing happen a few weeks ago. If you look at the data in table form (Data History menu item) you will see the data is usually logged every 4 minutes. When this error happens you are getting two sets of logs each occurring every 4 minutes. It's like two different inverters are reporting to the server and they both get recorded in your log. In my case as in your, it went away after a few hours. If you access the inverter through the phone app using "local connect" you will see the inverter is not jumping around like that. It's a Monitor issue.
I thing there was something going on with EG4 monitoring see below my logs from today:
The inverter supposed to switch to self consumption at 6 am, and switch back to gris at 8 pm.... nothing worked as supposed to. Finally I have restarted the inverter and all seems back working - yet the weird SoC reporting continues.
Brgds
K