Fireballs shot in the air via dispenser or similar do not despawn upon crossing a certain Y limit like wind charges do, meaning they can get stuck extremely high in the air with no way (short of commands) of retrieving them. Over time as more fireballs are fired this may affect the performance slightly.
We do not have enough information to reproduce this issue.
Please include the following information to help us understand your problem:
Please also attach any needed commands, add-ons/behavior packs, data packs, resource packs, screenshots, videos, or worlds needed to help reproduce this issue.
Refer to the Bug Tracker Guidelines for more information about how to write helpful bug reports. Bug reports with insufficient information may be closed as Incomplete.
This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
Quick Links:
📓 Bug Tracker Guidelines -- 💬 Community Support -- 📧 Mojang Support (Technical Issues) -- 📧 Microsoft Support (Account Issues) -- 📓 Project Summary -- ✍️ Feedback and Suggestions -- 📖 Game Wiki