Hello,
The latest build of Spread i.e. Spread Studio for .Net v3 provides support for IE11. However, I am still able to replicate the issue at my end with IE11.
I could not find any support ticket related to the issue described above. Could you please share the support ticket ID, so that we can track the issue further or post a new ticket for this issue if required.
Thanks,
Manpreet Kaur