Duckling egg externally pipped but no movement or developing in hours. Please HELP!

[Frodo the Pekin]

Hi!! It's day 27 of my duck incubation journey and one of the eggs has externally pipped overnight and at about 9 AM when I woke up to check on them there was a small cracked bump like they do once they start to externally pip. The previous evening I could hear it tapping and saw it rocking. It's currently 7 PM and no furthet development from that bump happened throughout the day. The egg did rock at times (albeit not as sporadically) during the day but it's been hours since I last saw it move. I also gently pushed the incubator to get it to possibly move but it still didn't. One of the other eggs did though, so that was my cue that another baby duck might externally pip soon. However, I am very worried about that initial egg. Should it not have cracked further by now? The no movement also scares me. I know that I should not assist just yet but I'm getting so paranoid lol
Any thoughts?

PS: The temp has been good and the humidity is reaching about 66-69%

 

[Huntmaster]

I would be patient as ducks can take even longer to fully hatch than chickens. It can take 24 to 48 hours from external pip to zipping out of egg.

 

[My15Ducks]

It’s probably ok. I’ve had eggs take 48 hours plus from pipping to hatching.