You can't even code a simple random number picker correctly.

[MilkieTea]

Surely just if number = 0 just add 1 would fix it then?

In easy terms, we're (likely) looking at:

0+bids (which is what your initial "bug fix" suggestion still is)

tacking on +1 would just make it:
0+bids+1

so it would end up pulling, in an example of 5 bids on a house, anywhere from 0-6 (so 2 bids that don't exist). Further exacerbating the problem. They need to make it so that it the RNG does NOT at ALL consider 0 as a possible bid, UNLESS there are 0 bids.