Huawei watch fit 3 nylon starp auto detach issue

Hello, I got the huawei watch fit 3, nylon strap edition a couple of days ago. Everything is perfect except a couple of times when i tried to wear it, starp got detach from the top. I also checked that a little push without pressing the detach button, also unhooks the starp. Is this a problem with the watch or is there any specific way to attach the straps?