The probability to find collision with LBC is vanishingly small, but...there is always a but.
This is misleading IMO, LBC is nothing but a brute force pool and has nothing to do with actual hash collisions. There is no evidence suggesting they have found 2 different private keys opening a single address. Also note that we have different types of collisions, one would be 2 different public keys having the same SHA-256 hash output, or having 2 different SHA-256 hashing to one RMD-160 output.