I’ve had the same exact problem with the XROS 4
Using any pod top or side fill. The side fill tend to leak. I vape salt nic. And use .either 0.6 or 0.7 ohms brand new pods straight out the box at least 2 will be bad . So I’ve probably had about a box and a half now total.
I’ve had the same problem with yhe XROS3. I had a box of 4 pods sold in a sealed sleeve in a sealed box and 3 of them were faulty. At $12.99/box that makes me kinda cranky. And there’s no remedy. I just had to eat the cost of them. I feel your pain.
I am not going to ditch my XROS but I have to say I’ve never had the problems of faulty pods out of the box with my Lost Vape Thelema Elite. I just don’t like them because they tend to leak.