Game crashes after generating multiple worlds in succession

Currently seed hunting in preparation for 1.16 release, looking for something specific so I am spending a lot of time generating a LOT of seeds (seed hunting)_. For the last 2 Snapshots, every 10+ seeds that I attempt to generate the game freezes and becomes unresponsive and then closes. Upon Reopening there is a message about the game crash and you just keep going. Not sure what is causing it but thought I would let you know.

I have attached 2 screenshots below of the game frozen and the message I get when I reload in after the crash.

 

Thanks for your time!