Here is the scenario. I have two different plants that have thrown male flowers, from 2 different seed lines. P1 male and female for seed line A come from known (grown) stable genetics. Seed line B confirmed stable P1 female. The P1 male may or may not be fully stable (have not grown enough to see, male was part of a one time F2 seed preservation run). Point being, the odds are both seed lines come from reliably stable genetics.

Question is has anyone else experienced high heat stress related herm issues in otherwise stable lines?

Seed line B I might would/could chalk up to a recessive showing. It being a F1 of a worked line being paired with a semi worked line. I have another pheno of the same seed batch though, on the opposite side of the room showing no signs at all of male flower.
Seed line A is F1 of two worked stable lines coming together.

Its an odd twist. Has anyone else experienced this related to high heat? I damn sure wasn't trying to make or wanting seeds this run, and will discard these, but if it is heat related its something I can address moving forward without ditching both lines. I dont know its just weird.