Fix | The block the hidden entity is about to enter is now checked. If it is a liquid type the entity is killed and the launch is ended. This resolves the issue where if you were launched into e.g. water, a water block would be turned into air and you could only replace it again using a plugin like WorldEdit.
Improvement | The jumppad clean up now runs during startup instead of shutdown. There were a few server freeze issues in 1.13 with this feature but this change should eliminate this issue. (If this is, in fact, the culprit)
As there are a few issues with 1.13 and JumpPads please contact me if you're experiencing any and I'll take a look!