Router (Unknown) using 99% upload bandwidth usage

[Dlon]

Hi, I have noticed when I connect to my router via DumaOS app (both android  and iOS), the upload shows very high usage.
When I check which devices (or any other category) nothing in particular seems to be taking up the upload.


Under "Uncategorized" there is 1 Unknown thing showing very little upload speeds, but upon clicking on it, it says the Router is using all the upload.
I cannot see this when I connect to my router via web browser, so I wonder if it's just a bug or if my router is possibly hacked.
It is quite strange since sometimes it shows over 2000 Mbps which is more than what I get from my provider.
I just did a speedtest which showed ~440 Mbps upload speed, on the graph it took a dip at the start of the test (to the ~400 mark) and went back up to 1500 Mbps+.
I restarted the router the other day and it was fine for a while, today I noticed it is happening again.
             

Could you please help me identify what could cause this? I would prefer not reseting the router since we have a lot of IoT devices.
Current version: XR700 V1.0.1.50-0626

[Dlon]

I would also like to mention that the upload was still shown even after I disconnected the router from the ISP's modem and the values continued to be the same.
Also CPU and memory usage seems to be normal - all cores between 10-25%, RAM is 80%+ free.

[Netduma Fraser]

It's just a graphical error, you can completely ignore it

[Netduma Greg]

Hi, could you tell me the router you are using and it's version, if possible?