Power locks in 2008 Ford Focus?

Hi everyone, I got a problem with my Focus power locks. Sometimes when I close all doors en the I put the locks with remote control some locks are hard of open again and I have to open manually with risk of broke or damage an internal part.

I went some months ago to change all the actuators so the problem were fixed but some months later the problem returned.

I bought that car in used condition furthermore isn't under warranty.

I wanto to supose if the problem is on remote control or is an electric problem in my car.

Have you ever had and experience like this?

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