Seal blowing out on Barista Express

Happy holidays, everyone! I need some help diagnosing an issue I’m having with my Barista Express. It started leaking around the portafilter when pulling shots and I figured the seal was worn out since my machine is about 6 years old. I replaced it with a new Breville seal and it solved the issue. A few weeks later, now the seal is blowing out and leaking water once again. I pull the screen and reset the seal and still happens every time.

I’m dosing 18 grams of coffee and pressure is always in a normal range. Same recipe I’ve used for awhile with no issues.

Please help me figure out what is going on!!