Yes, that's correct. This is (unfortunately) a common problem with many LED lamps and fixtures.
The culprit is the switching rectifier in the LED driver. This is the component that converts AC current into DC current so the current can power the LED's. The rectifier generates high frequency electromagnetic radiation (EMR). This EMR is also called EMI (electromagnetic interference) because it can interfere with other devices that use high frequency signals such as garage door openers and other wireless control devices.
The extent of the interference depends upon the strength of the EMI and the distance to the wireless device. Surprisingly, a single LED fixture installed at up to 50 ft. from a wireless device can prevent that device from working. Multiple outdoor fixtures with problematic EMI can take out a home's entire wireless lighting control system.
A properly designed LED driver positions the rectifier and other components to minimize the EMI and employs shields and/or filters to further reduce the EMI. EMI can both be radiated (travels through air) and conducted (travels through wires). Both types must be minimized. Minimizing EMI is standard practice for the design of any kind electronic circuit. The fact that so many manufacturers neglect this requirement is shocking. The primary reason for this neglect is the difficulty and expense in eliminating EMI in the very tight space of an MR-16 driver compartment.
How do you know if EMI has been effectively minimized? Look for the FCC mark, and a statement that the device complies with FCC Class A or B. If you don't see the FCC mark on the device or its packaging then you should conclude that EMI could be a problem. You should never install an LED in a residential or commercial property if the FCC mark is missing.
By the way, FCC Class A is a commercial rating - Class B is a residential rating. Class B is a tougher standard since it recognizes that residential properties have TV's that are highly susceptible to EMI. Devices with either Class A or Class B are likely to be OK, but Class B is better.
All CAST LED fixtures and modules are FCC Class B rated and will not interfere with wireless devices.