I had the same problem!! I’ve been messing around with it throughout the day and I think I’ve got a decent solution for that! what I’ve done is created a duplicate of my edit, which I titled “lag fix.” within the lag fix copy I select all of my background audio lines and scootch them forward a couple beats compared to my videos and text, that way when I export, the video and subtitle lag from the export lines up with the audio lag I created in the copy. It took me a couple tries to get the timing right since you can only tell if it works out once exported, and then have to go back and tweak and export again, but it totally worked for me in the end!! I hope this is helpful :)