DNS leaking

Recently noticed, that if I'm using NextDNS, I'm getting leaks

 someone called Misaka Network appears, correct me if I am wrong, but this doesn't look like NextDNS service.

Switched to cloudflare

 no leaks.

Switched to google

 no leaks.

Switched to OpenDNS Home

 no leaks.

Clearly it something to do with NextDNS, not with my configuration.

https://test.nextdns.io returned this:

{
"status": "ok",
"protocol": "DOH",
"configuration": "fpef9e64ccdabf8a56",
"destIP": "45.90.28.0",
"anycast": true,
"server": "zepto-lon-1",
"clientName": "other"
}

This problem was already rised on different topic, but it was on general discussions section, so I'm raising this issue on Bugs section with hope, that by doing this, it will get more attention from @nextdns 

My paid plan is expiring at end of this month, so I will have to look for alternatives. If someone knows good alternative, please comment below.

Many thanks