I have sat watching carp on various waters pick up and eject goodness knows how many rigs.
I have not yet found a single rig that is totally anti-eject, pop-up, bottom bait, or critically balanced. Pop-up rigs can be taken or ignored, if the pop-up is tested that rig is often totally blown, it just won't catch from the fish that tested it, or sometimes any companion fish in that group.
A blow back rig will behave differently from whether it is a bottom bait or a pop-up; a pop-up will usually reset, where a bottom bait is stuffed.
The strange thing is that bottom bait rigs can be forcibly ejected and blown out, or just 'fall out', where I have seen, personally, pop-up rigs tend to get blown out more. That may be different for others.
Also rigs work differently on different fish, waters, lakebeds, even different areas in a lake.
I think it was Danny Fairbrass who said (a fair few years ago, so it is possible his views have changed), that curved shank hooks don't need any tubing as the 'Kurve' itself that stopped the rig being ejected, however after watching my own plain straight knotless knotted curve shank rigs being ejected with ease by a couple of fish (not even big fish) I found that a line aligner does help. Extending the shank length on many hook patterns really improves hook-ups and reduces the chances of a rig being ejected, that is straight shank and curved shank hooks.
This extending the hook shank lead to things like The Savay Looney rig, the longshank hook patterns, line aligners, even kickers as longshank Bent hook rigs were banned.