yes, you are right. Unfortunately this is a known issue, produced by a bug in the used third-party Wii-library which WD uses to connect to the Wii-motes. Please try to ensure a proper bluetooth connection by having a small distance between sender and receiver.
Sorry for that, Markus
Markus Zeppenfeld Senior Product Manager, Pandoras Box
"Have you tried turning it off and on again?" (from "The IT Crowd" / channel 4)