I've been promoting OpenAlex use for years and the query I use to demonstrate is the famous:
whales AND NOT killer,
which gives me more than 50k results. When I add the SDG filter Life below water OpenAlex returns around 3K results, but when I get rid of the SDG filter (i.e. only
whales AND NOT killer remains) , the results are around 4k. They should be back to 50k results.
Is there something wrong, isn't it?