iOS: whitelisting doesn't work

[Phlogiston90]

Hi,
I really like your app, but I cannot whitelist anything when having the dnsforge.de resolver selected. The idea is to block anything (determined by my chosen dnsforge.de resolver) but whitelist google ads, so that I can click on the "promoted" google search contents that google displays before any actual search results.
I enabled the whitelist in the UI and picked a txt-file I created with the sole line
*googleadservices.* as content. I also enabled the whitelist log.
Still, the googleadservices are blocked. However, I do see in the whitelist log the following:

[2023-06-18 16:16:58]	127.0.0.1	www.googleadservices.com	.googleadservices.
[2023-06-18 16:16:58]	127.0.0.1	www.googleadservices.com	.googleadservices.
[2023-06-18 16:17:00]	127.0.0.1	www.googleadservices.com	.googleadservices.

I also enabled service logging. There I found a suspicious entry:
[2023-06-18 16:16:46] [NOTICE] Use of [whitelist] is deprecated - Update your config file.
However, in the config file, it says in the comment header that I should use the UI to pick a whitelist file, exactly as I did.
Could anyone please help me?