I suppose before inserting primaries a quick voltage check is in order. Especially ones just received in bulk.
I had a plastic 2xaa light poof on me in a grocery store parking lot. Thing is I had been using it, ran up to the store real quick to grab a pack of smokes with it in my jacket pocket. I felt my pocket getting warm, warmer, hot as I was entering the store. Pulled out the light that had swollen and tossed that sucker when "pow" like a firecracker....
It was a deal where I had pulled 2 leftover batteries from a drawer and slid them into the light.
Lesson learned that in this case one battery was apparently trying to charge the other that had a lot less voltage remaining.
I never use leftover batteries in pairs ever since and when a new load of 123 primaries arrives I check voltages, then store in a smaller container to pull from when time to reload a light. Either that or pre-load 2-3 cell magazines.
Any that vary significantly go into a separate container for use in single cell lights.
And I DO NOT USE primary batteries made in China. Too many fakers in that region so there's no telling what you get unless you know for certain the seller is above board.
So hopefully whichever solution the op decides to use with his 4x123 light, a voltage check will be done before batteries are inserted.