Reproduction steps:
1. Open the attached project ("case_1251231-CompositeCallbacks.zip")
2. Open the repro scene ("SampleScene")
3. Enter Play Mode
4. Press "A" and "S" keyboard keys at the same time and immediately release them after the press
5. Notice logs in console logging "started" and "canceled" events
6. Wait 2 seconds
7. Notice logs in console logging a new "started" and "performed" events

Expected result: No new "started" or "performed" events should be triggered/logged
Actual result: "started" and "performed" events are triggered even if the keys are not being held/pressed after releasing them

Reproducible with: 2019.4.8f1, 2020.1.2f1, 2020.2.0a20
Couldn't test with 2018.4 (minimal package version not supported)
Reproducible with package versions: 0.9.3-preview, 1.0.0

Notes:
1. The issue does not reproduce when the keys are not pressed at the same time (either by first holding one key and then pressing the other or by pressing them together slightly more out of sync)
2. In the repro project, "performed" event should trigger when holding both keys for 2 seconds