Updated mine (from 6.0.6) and played a few games and it really seems to have fixed several issues plus I like some of the new features. The clipping audio appears to be eliminated completely, the castle doors now seem to detect when they have been pushed open better (and close more reliably) and really like the balls remaining display. I haven't played any multi-player games yet or tried adding players during the game but that will be next. The jury is still out on having the magnet by the flipper catch the ball on orbit shots when Capture Dorothy isn't lit but the Witch is, surprised the hell out of me the first time it happened! It really is awesome to keep getting support like this, thanks Keith and crew for all the work!

No problems like that with Chrome on Win 10 for me.

I just tested it with mine and it worked perfectly, no drop target problems during that or during Rescue MB when it immediately pops it back up when hit. Have you gone into test mode and tested the release solenoid to see if the target drops cleanly then? Also make sure the sticker (if you have one) on the target is not loose at the bottom and hanging up occasionally. The fact that you have to hit the target multiple times to make it drop sounds like a mechanical problem and it's so far been a coincidence that it only happened during MTW.