GLONASS Reception Failure [Bug 12]

[Wojtas81]

Montana 680t, firmware 3.50 - zero issues with GLONASS

UPDATE:

Montana 680t, firmware 3.50 - GLONASS no longer works.
eTrex 30, firmware 4.90 - GLONASS still works.

Montana 680t was released in 2015.
eTrex 30 was released in 2011.

So release date of the device doesn't matter.
Some devices are now simply unable to receive data from GLONASS satellites and nothing can be done with it.