I noticed the first wheel pair of the rear gear will lift of the ground even before Vr. (Around 90 knots)
While the second wheel pair gets pushed into the ground.
Looks strange, I think this would not be the case in real life : https://youtu.be/85pjylEh194?t=30
(all 4 wheels touch the ground even after the front wheel lift off)
No one cares? 
Could it be a trim issue? Do all the rear wheels touch the ground when you pull up the nose when you do not have enough speed to lift off?
I didn’t pull the nose with low speed. I didn’t do anything except thrust, around 90-100kn the first wheel pair lifts off while still accelerating. When I rotate the aircraft rolls on 4 wheels (2 pairs)! 
I did two example videos to show the issue, hope this helps:
Can anyone verify that I’m not the only one with this issue?
Did you notice whether it did this pre-World Update 3 as well? It’s possible that this is connected with the ground effect modification in that update. As I understand it, the lift effect was effectively moved rearward to stop the overly quick liftoff of the nose wheel and subsequent nose down pitch on the front of the airplane leaving ground effect before the rear. So, it is possible that this is an unintended side effect, but that is pure speculation on my part.
No, world update 3 didn‘t affect the problem. The first screenshot I posted here was before the update. 
Oh well. I knew it was a long shot, but thought I’d try!
787 - Always has been … Landing is also nose-first affair no matter the fuel or payload loaded. Landing on the main gear also in the tilted position for quite some distance until eventually it flattens out. Together with the very bad performance compared to the 747-8 or FBW A320X , it doesn’t seem to get much flying time going from the lack of discussion on the 787 here.
The OP was made before WU3. So that would be yes 
this issue still presists. the landing gear dont want to flatten out on landing untill the nose is down.
Yeah, should be an easy fix but no one cares… maybe more people notice this after the release of the official replay function.
I give it a vote but honestly, without that post I would never have noticed that issue. I sit always in the cockpit when flying so I have never seen the gear all the time.
Yes, it’s only important if you use the replay function - but I think the gear should have correct physics in a flight sim. 
Which replay function? Did I miss something? 
There is a pretty good (free) replay addon: Flight Recorder » Microsoft Flight Simulator
Nevertheless Asobo announced to release their own tool soon, maybe as a beta im dev Mode or complete version later.
It also looks like the tilted gear of the 747 has the same problem.
Edit:
according to this bug report: Please make it possible to describe landing gear geometry and behaviour in more detail
it looks like the problem is that MSFS SDK does not support more than 1 contact point on the bogie there is some serious need of improvement 
Pretty weak. 
Which aircraft are you experiencing this issue in?
Boeing 787
Are you using Developer Mode or made changes in it?
no
Have you disabled/removed all your mods and addons?
no
Brief description of the issue:
When you have no weight set in the weight and balancemenu the main landing gear floats
Provide Screenshot(s)/video(s) of the issue encountered:
Detailed steps to reproduce the issue encountered:
- Load into any airport with the 787-10
- Open the MSFS Weight and Balance menu and set both the payload and fuel slider to 0%
- Observe the main landing gear
PC specs and/or peripheral set up if relevant:
Build Version # when you first started experiencing this issue:
AAU 2 Beta (1.33.5.0)
For anyone who wants to contribute on this issue, Click on the button below to use this template:
Do you have the same issue if you follow the OP’s steps to reproduce it?
Provide extra information to complete the original description of the issue:
If relevant, provide additional screenshots/video:
Do you have the same issue if you follow the OP’s steps to reproduce it?
yes
Provide extra information to complete the original description of the issue:
yes have the same issue. sometimes at crosswind landings during rollout , the aircraft banks to one side and the main landing gear is floating too and does not go back in its neutral position after the aircraft slows down. there is something really odd going on with the modeling of the dampers.
If relevant, provide additional screenshots/video:
