Fireworks after a Pillager Raid kills the villagers

Steps to Reproduce:

1. Build a glass cage
2. Inside the cage, place a bed and spawn some villagers
3. Start a raid and complete it
4. Observe the villagers

Observed Results:
The villagers are damaged by their fireworks and eventually die.

Expected Results:
Villagers should not launch fireworks when a ceiling is above them.

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Original Description:
After sucessfully completing a Pillager Raid, the fireworks display kills the villagers.

We have a village enclosed by glass used for an iron farm. The village is elevated 8 blocks.

After completing a Pillager Raid, fireworks appear inside and above the village. The villagers are killed by the sparks.

This is a repeatable event. We have done 3 raids and lost the villagers each time. On the last attempt, 1 person stayed inside with the villagers while the other person completed the raid. The person inside with the villagers observed the fireworks killing the villagers.