I have not encountered the last round hang-up problem in the tube fed lever or pump action 22's I have had. Is this just an issue with the bolt actions? Are some models more prone to it than others?
It's usually an issue due to the rifle not ever being cleaned, including the inner & outer magazine tubes or the feed throat system.
Dirty ammo run through the rifle by the hundreds and thousands of rounds, never any maint to the gun down in the mechanism,,even a drop or two of oil.
There's lots of springs, a carrier, follower, ect in there and it all has to work just right. Careless or just indifferent handling leads to dents in the tube, rust in the follower spring.
It only takes one time for a round to stick and hold back for the shooter to think the rifle is empty only to have it snap forward after the bolt is closed the final time and the round is then right there ready to be loaded the next time the action is operated.
It's just awareness that is needed, and that should be there when any firearm is in hand, not just a tube feed model.
But a tube feed of any sort is particularly prone to that sort of potential problem.
Even a pump shotgun or tube feed L/A rifle can have a round stick part way up in the tube and go un-noticed, the gun appears unloaded.
Only to dislodge and be fed into the chamber later as the action is worked on that unloaded firearm.
The 'unloaded gun' then fires.
At least the tube feed 22's you can run a dummy round through the mechanism and out into your hand to confirm there is nothing else in there.
Something you can't do with a closed ended tube feed like on a pump shotgun or LA centerfire.
Those brite colored followers for the latter are a good idea for a visual check for an empty mag tube. MAny of the tube feed 22's have them too now.