Hello @8179,
Based on your description, I am not able to reproduce your issue. Here’s my output:
root@omnia:~# opkg install nextdns
Installing nextdns (1.8.6-2) to root...
Downloading https://repo.turris.cz/hbl/omnia/packages/packages/nextdns_1.8.6-2_arm_cortex-a9_vfpv3-d16.ipk
Configuring nextdns.
NextDNS installed and started using procd init
root@omnia:~# opkg remove nextdns
Removing package nextdns from root...
Not deleting modified conffile /etc/config/nextdns.I think the issue is elsewhere and I suggest you to reach our Technical support with diagnostics. More details can be found here: https://docs.turris.cz/basics/support/