So in summary, if the oleos are serviceable it just comes down to poor landing technique................
^^This^^
Usually caused by slight forward motion on landing, with the brakes on. The oleo(s) compensate for the forward movement by compressing.
Fixed by Tailstinger’s method above. Apply pressure to pedal brakes, turn off hand brake, release pressure on pedals momentarily then reapply hand brake.
How to avoid it? Land vertically.