Yes, a few people have run into this with longer recordings in Action!. It is often related to audio sample rate mismatch (for example 44.1 kHz vs 48 kHz) or variable frame rate recording. Try setting both Windows sound settings and Action! to 48 kHz, and if possible enable constant frame rate recor...

I understand your concerns. The long silence is frustrating, especially after such a promising announcement. Hopefully the team will share an official update soon to clarify whether development is still ongoing or not.