Leak off pipes

[Jen84]

Hi all
I recently had the leak off pipes replaced due to one leaking (which ultimately caused a small fire under the bonnet ).
A certified reputable mechanic did this replacement . Unfortunately the leak off pipes keep popping out , it’s not always the same one .
The clips are new also, also no pressure issues .
Has anyone had this problem and been able to solve it . I can’t really drive it as you never know when one is going to pop out .
2010 mondeo titanium tdci
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