I'm having exactly the same issue with this strain (+ Speed Auto from Sweet Seeds) at the moment.
It is day 14 from planting the seed in a Jiffy and the plants do not grow at all. They stopped growing shortly after showing up.
I have no idea why. I have a 2nd tent in the same room with 3 Bruce Banner #3 which are doing great. Same soil, same air, same temperature (17-21° C).
Done many grows before with this setup and never had any problems like that. Is this strain known to be particularly sensitive to something (like lower temperatures for example)?
like