Yes - very unfortunate with the additional issue that the seconday modem has much less signal quality .... as reported separately some year ago.
I move these a lot between multiple locations, they used in normal office and home environments, but gets moved and plugged in and out a lot, and their placement differs from time to time (wherever it can be placed), I iam in Spain so it's not uncommon with room temperatures over ~30 degrees.- device gets VERY hot (can be part of the problem too)
it's clearly a flaw either in the soldering in my two units (defective), or these very small soldering points are just not enough to take the pressure from being plugged in and out repeatedly (multiple times per month) - the nature of the plug (it requires more force than most power plugs in this size with the 4 connectors - can be part of the problem)
Imho. The prefered improvment is something that holds the receiving end with some addtional mounting rather than just the electrical soldering points, I will let some local electronic guy fix these for me (they both need repair anyway) with some additional "hack" to make them futureproof.