Hello Balan Murugan
I was able to reproduce the issue from my end. This seems to be a bug as the check mark is enabled to select the incremental or full copy for the selected dataset in the share subscription.
Alternatively, if this is expected behavior, the checkbox shouldn't be enabled for a single dataset.
If this is expected behavior, I would suggest submitting a feature request.
Workaround:
As a workaround, please obtain multiple invitations with the datasets you want to trigger for the snapshot. This way, you can trigger either the full or incremental copy from the respective share subscription.
I hope this helps unblock your situation.
Please let me know if you have any further questions.