MVYa may be, with a 270hz touch sampling rate these issues are pretty possible. The idea of decreasing button sizes is great though.
I might be late cause I just got my first asus phone in years after using other brands. The issue mentioned here is clearly present on other devices as well. Oneplus, ipad and samsung same issue everywhere. Instead try using static( not dynamic) fire button only and increase the size to maximum rather than using both the buttons overlapped. They will surely cause interruptions w and will piss you off. The other issues that pubg mobile is yet to resolve is multi touch movement getting stuck and scope and peak is set to hold. I might be wrong but this resolved my issues on all the devices I own.
plugmeup24You can try reducing the fire button size for ur index fingers. As the screen is highly sensitive and with 270 Hz touch sampling rate some ghost touches are occurring on the same button and it stops firing. I tried it by reducing the size and the situation got greatly improved.
@himadri52 Bro I'm having the same issue. When will they come with a permanent fix? Cause playing pubg is becoming annoying with each day because of this problem. Are you running on the tencent global flashed version btw?
@Anders_ASUS I'm leaving a clip for you. Please resolve this issue Permanently.