Alt + Shift + Drag to batch replace is broken.
Alt + Shift + Drag works perfectly if you do it one clip at a time.
If you do it for a batch of clips, Premiere decides it's time for a timecode rodeo and you're the one riding the bull. Only the first syncs properly, then for the rest of the clips all bets are off. Hours of work wasted, grey hairs multiplied.
For the love of all that I love, why? Why would it work one way for one clip, then a way NO ONE NEEDS for a batch? Why have this work for batches at all if the only result is betrayal and heartache?
Please, have it just repeat the EXACT SAME process as for one clip when you ALT + SHIFT + DRAG to replace a batch. We don't need this kind of unpredictability in our lives.
