Yeah, the lever is mostly being held closed, during firing and recoil, by hand pressure against the stock.
The plunger mostly holds it closed otherwise.
Sounds like kind of normal.
In other words, get a good grip on it.
You know, like John Wayne and the Rifleman.
Walt Kelly, alias Pogo, sez:
“Don't take life so serious, son, it ain't nohow permanent.”