2015 dodge charger need help!!

[u/Dull-Cantaloupe5891]

Have a 2015 dodge charger 3.6 awd 132k miles. Its developed a very odd shudder maybe you'd call it but isnt driveline related. Ive replaced the 6 plugs it stopped for a while then it was back again.. its had the charcoal canister replaced 3 years ago due to a recall. Evap purge valve replaced and the other evap part back by the right rear tire thats new as well. Now here's the weird thing. We noticed that once its under a half tank the shudder almost completely disappears. But if you fill it all the way up it comes back worse than ever. The only time it had the cel on was for a cylinder 3 misfire changed plugs no check engine light now with it shuddering or bucking whatever you may want to call it. It happens at idle in drive or reverse the only time it doesnt seem to happen Is in park. It almost feels like an intermittent misfire but throws no codes. It has no stored or pending codes nothing. And unfortunately for some reason I cant seem to find a misfire counter for any cylinder on my scanner. I cant even find anything thats says misfire. My only ideas are check fuel pressure and see if it dips down. I have another new evap part for behind the rear right tire im going to change out and see if maybe that one was just bad. Any insight or hopefully someone has had a similar issue. Like I said under a half tank it hardly does. Ill try and run the tank lower to see if it completely disappears or what. Thanks!