[Q] calling problem

I have a M5 dual, Recently when I Want to make phone calls, It takes about 30secs to make the call (the ongoing calling screen appear with just hangout icon, all icons that related for calling like mute or dialpad appear after call established,30 seconds, but the phone didn't crash or freeze, I can hangout the call),when I switched phone to safe mode it didn't have the problem and make the call almost instantly, I'm also using 1 simcard
My phone have stock Rom (6.0)
is there anyway to solve it without factory reset?

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