csuite test wt2695_checksum will occasionally fail with a error. When run with sanitizer they point at the [ following line|https://github.com/wiredtiger/wiredtiger/blob/3eb8e185b8f87be4aee5c27ebd21436190c0e1fb/test/csuite/wt2695_checksum/main.c#L313] which is calling wt_random.
In the line

chunk_len = (__wt_random(&rnd) % len) + 1; /* Avoid 0 sized chunks. */

len is a random value in the range DATASIZE == 128 * 1024, so it's possible the error is tied to the size of len and which is only rarely large/small enough to cause the error, hence the need for stressing to hit the issue.