Live Traffic - duplicated flights on ground

[Delta2k5]

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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:

What first seemed to be an issue with models using the same livery on all aircraft of an airline looks to me like an issue with the way live traffic data is handled.
I let the sim run in background and checked the aircraft landing and populating the gates - using LittleNavMap I found that after some time multiple aircraft with the same flight number and the same livery on the same aircraft model spawned.
By time these aircraft occupy all gates and get randomly replaced whenever a new aircraft spawns. The sheer amount of spawns and aircraft affects performance in a negative way.

Provide Screenshot(s)/video(s) of the issue encountered:

Wrongly placed aircraft, all flight JAL6 at JFK featuring the same livery

On LNM you can see all the duplicated flights from above plus other ones sharing the same flight number

Correctly spawned aircraft with a correct variation of liveries applied:

Detailed steps to reproduce the issue encountered:

Optional: deactivate generic models in official/Asobo_Generic_XXXX folders (icao_generic=0) to avoid these spawning instead of proper liveries.

1. Load at some busy airport with AIGs pack installed (as AIG has the biggest variety of liveries)
2. Let the sim run for 45min+
3. Check the situation using tools which provide the flight number and livery selected like LNM

PC specs and/or peripheral set up if relevant:

Build Version # when you first started experiencing this issue:

1.30.12.0 but problem seems to exist since SU10 or SU11

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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:

[DM5555555555]

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:

fog bound EGPD today flights which are actually delayed in reality are landing and parking all with the same flight nuber and departure and destination info. Happens with BA flights and Loganair and the airpaost stands eventually all get taken.

If relevant, provide additional screenshots/video: