Problems with creeper shader

Video: https://imgur.com/a/I1SiZKF

1. Summon creeper
2. Go to spectator
3. Left-click creeper
4. It's green
5. Hold F3 and press F4
6. Green vanishes
7. Press F4 until you get spectator and release F3
8. Green isn't back
9. Repeat step 5
10. Green is back

Expected behavior: Green don't vanish