How many bots? How many species? How long did it freeze? Was the cycle count on a multiple of 100? How about a sim?
If your going to file a bug and expect me to do something about it, it would help if you actually gave me enough information to do something about it.
It's almost certainly not frozen forever but on your machine, which I assume isn't the fastest, it might seem that way. The work to decide if speciation should occur is very cpu intensive and it does block the sim while it is being done. It is also very sensitive to the size of species. For the same number of bots, if you have few species with a large number of members, it will take longer than a larger number of species each with fewer members. On my fairly fast machine, it takes maybe 15 seconds (on a sim of 2000 members) to update the speciation graphs and/or do the work to see if speciation should occur.
In 2.44.1, the schedule for checking if speciation should occur is configurable.