Hi Glen,
Thanks for contacting Syncfusion support.
We have validated your reported problem in Tooltip component. We were unable to reproduce your reported problem in Tooltip component, the Tooltip works fine in our issue validation sample. Please refer to the below link of validation sample.
If the issue still persists, please share some additional details. It will be help us to provide you the prompt solution.
1. Share us the Tooltip rendering code block.
2. If possible, share the issue replicating sample or else replicate your reported issue in the shared sample.
3. If facing any script error, share the screenshots.
4. Share us the screen recorded video with issue replicating steps.
Regards,
Muthukrishnan K