Historically, this is down to drivers in the PBA being incompatible with the device in question.
As it requires updates to the PBA, I'd recommend logging a case with Symantec, so that they can add the relevant drivers for the next update (also note you're more likely to see this update first in SEE rarther than SED.)
Please also review the below articles about Virtual Keybopards in general. Again, note that these focus on SEE, not SED:
https://www.symantec.com/docs/TECH250536
https://www.symantec.com/docs/TECH237200
https://www.symantec.com/docs/TECH230344