Audio Channels are behaving weirdly
So it's pretty weird issue i'm dealing recently with Adobe Premiere Pro 25
When i add a sound to timeline:
in the first audio channel the sound only comes from left
in the second audio channel the sound only comes from right
in the 3rd & 4th i hear no sound
but some how when i move to 5th channel the sound is okay,
i record a short video for you so you guys can understand easily: https://youtu.be/zwEfKbd2P2Y
i have no effects on the sound, and i clicked all the buttons audio channel part(A1, A2 etc.) yet i have this issue, also when i create different projects there is no such this issue, so i believe i did something wrong or something like that and i would like to learn how to fix such things.

, i was asking this icon, mine is different,