Hundreds of Airplanes?

Do you have any add-ons in your Community folder? If yes, please remove and retest before posting.
Yes, but they don’t affect this bug.

Are you using Developer Mode or made changes in it?

Brief description of the issue:
When I pause the game using the ESC key, then come back to the game after a while, especially when I am in or near an airport, seemingly hundreds of airplanes suddenly appear when I un pause.

This is very taxing on the system.

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

See video:

Detail steps to reproduce the issue encountered:
See above.

PC specs for those who want to assist (if not entered in your profile)

Did you submit this to Zendesk? If so, what is your ticket #?