Hi
Yongkee Cho,
Thank
you for reaching out to us!
Based
on the details you shared, we have checked the issue on our end but were unable
to replicate it. For your reference, we have provided a validated sample below.
Sample:
https://blazorplayground.syncfusion.com/rthyNvBCUGThDhBh
Week view spanned event:

Day view spanned event:


If
you are still facing the issue, we would need additional details to
replicate the exact problem on our end. We kindly request you to
provide the following details, as this information will greatly assist us
in understanding and resolving the issue effectively.
- Share the exact code snippet used or the specific steps
followed to replicate the reported issue
- Provide a simple sample that replicates the issue or is
replicated in our shared samples.
Please
get back to us with the required details for further assistance.
Regards,
Saritha
S.