Are you using Collector Limpets and selective targeting to pick up your cargo? Doesn't sound like you are if you are seeing cargo disappear from a debris field. It takes a good bit of time for that to happen and I see no changes in this behavior from 2.1 to 2.2.
If you are trying to grab cargo in space manually, you're simply doing it wrong. Collector limpets and selective targeting of what they pick up is the way to do it. I've done a lot of that kind of stuff in the game and manual scooping just isn't efficient enough. Just buy a class 5 set of limpets (3 at a time is best with either a 5A or 5B module) with good range and a reasonable life span and you should easily be able to collect most hauls long before the cargo starts to degrade and despawn.
And make sure you selective target using your left hand CONTACT panel. I know some commanders still manually target materials and cargo canisters using visual ID and lock on which will take forever. Go to CONTACTS and there will be all of your cargo or materials in the debris field. Click on what you want and launch a limpet to go after it. The second the limpet is on its way you can select the next target and launch another limpet. If you want everything out there, just launch all three limpets one after the other and don't target any specific item. The limpets will then go back and forth collecting everything that is out there until they have collected it all.
Even with the nerfed max Limpet speeds, you can still collect a reasonably large amount of ship debris and/or cargo canisters before they degrade.
i was living off piracy since the game came out, bought all my ships with it, dont tell me howto reinvent the wheel. Offcourse i use limpets, who doesnt. The problem is, the ai useally fight back, sometimes it takes time too take out the ai so i can ficus on picking up the cargo, but when im done fighting all that juicy cargo has turned to space dust. It wasnt like that before.
Cant imagine this fast deteriating cargo can be good for PVP piravy, imagine you are a victim and decide to fight the pirate, he limpets your cargo, you kill him and you probabøy want to pick up your cargo again, but you cant, its gone.
All that new fancy stuff in 2.2 doesnt matter anymore for me, because i cant play anymore because frontier decided to ruin my proffesion. Thanks alot frontier!!!!!!!!!!