Reproduction steps:
1) Have "Ashaya, Soul of the Wild" on your battlefield.
2) Cast "Mythweaver Poq"

Platform: PC
Results: Successfully casting Mythweaver Poq results in infinite conjuring of subsequent Mythweaver Poqs even if the legendary rule resolves and destroys the newer copy of Poq.
Note: This does NOT trigger if the order is swapped and Poq is cast prior to Ashaya.