Problem I have in group conversations:
1) don't understand a key concept
2) feel like it would 'hijack' the conversation to chase it down
3) pause all information intake until resolved.
I have this problem too! It's not always the case, but often others also don't understand the key concept—yet are too timid to say so. In these cases there's often a sidechannel "I didn't get that either—thank you for digging in!" afterwards.
As a teacher, "are there any Qs?" means "I'm about to go on"
There are always Qs, unasked!
So as a speaker, or teacher, "what's your first question?"
As a listener, "many may ask ___"
Assumptions of a perfect one-take socially constructed knowledge are greatly exaggerated.