Let's not start this argument again! As I said in my reply. In my opinion.....
Each to their own. If it reassures a plumber to use ptfe on their compressions. Then fair enough. But I would be expecting those fittings not to leak in the future. And in the op's case. They have leaked.
Not blowing my own trumpet in any way. But I don't use ptfe on my compressions and they don't leak. Maybe it's just luck
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