Similar testcases while fuzzing platform bios

The fuzzing process for example 5.3 "Fuzzing a platform BIOS" **started successfully**:

I expected to see the bugs added in example after some time. I left the fuzzer running for a while and the logs are as follows:

The first thing that confused me is **exec/sec: 0.000**.
I tried to use different data in corpus, but specifically in this case I used 7 different bmp images. So the second thing that is confusing is that the fuzzer used only two input images (only 2 were created in the corpus) and then nothing happened over time

After that, I stopped the fuzzer and started it again (I did not delete those 2 pictures in the corpus). And in this case **exec/sec: is not 0.000**

next, I repeated the previous iterations but at the **logging level 4**. I left only 7 test bmp images and run a fuzzer with a logging level 4. As you can see, testcases are the same

After that, I restarted the fuzzer (there are 2 additional images in the case from the previous start). In the following logs, you can see that the size of the testcases is different, but the data is the same:

And as a result, it is not possible to find the added bugs, the solutions folder is empty