So when will ChipMixer move to v3 onion service?
Plan was to add v3 around middle of May 2021. It did not happen. External dead lines are:
July 15th, 2021
0.4.6.x: Tor will no longer support v2 and support will be removed from the code base.
October 15th, 2021
We will release new Tor client stable versions for all supported series that will disable v2.