Currently I'm specifying intensity 24.

Before employing TBM I was getting stales of around 0.5-0.8%. Now I'm seeing around 1.25-1.5% so this is within the range you specified and not anything unusual.

I mine on crazypool because they tend to be one of the more profitable pools to mine at and I prefer to mine on smaller pools. They also have a lottery system which affords the chance to win 0.1 ETH.

The git page seems to have some odd information here:
https://github.com/sp-hash/TeamBlackMiner/blob/main/FAQ.md
Conflating uncle blocks and stale shares. Even if that were true, crazypool does find and pay out uncles.

I checked a few of the pools on the page (MPH, f2pool, 2miners) for their stales policy. MPH and 2miners don't say anything about it one way or another. F2pool indicates they don't pay stale shares.

The client seems to be running per expectation on my end and I'm going to continue with it for a couple days to get a more conclusive result to compare with.