I also get erratic behaviour from the ripple markers. I love this feature – awesome for producer/client screenings where I can make notes on the timeline, address them later, make my notes in the comment section and then output the markers as text for a “here’s how I addressed your notes master” document.
BUT!
Ripple markers have a mind of their own no doubt.
They respond consistently to insert and ripple in-out edits but no so much with extending clips, selecting clips and cutting them out with command-x, etc…
Does anyone have a good reference for “when markers ripple and when they don’t?”
All the guess work really detracts from using them in my workflow.