Last weekend I had a similar spontaneous problem, with the brakes landing.
I got mapped on the Thrustmasters Hotas Warthog Throttle on button 8(forward) brakes, and on button 7(reverse) toggle parking breaks. So push the button forward to break, and ones “parked” one click backwords. Rest ones standing in spot finally I do manually(with help onscreen).
So lately as the button 8 stays in place at 15kts pulled `em back. And this did not stop my desired action. It kept breaking/slowing down till full stop for my surprise. 
With a big surprised face I gave more throttle forward, but aircraft was nailed to ground. So of course in the same button with three positions(one is lost in the middle thanks to incapability mapping such state in options inside FS2020) I gave it a try to toggle the parking break, so of I went forward. 
This is strange, I am absolutely sure that I pusehed the button forward, I mapped it this way in FS2020, because it seems to me the most intuitiv.
But things can happen different in FS2020, now and again independent to the aircraft/airport, as I like to fly all over the world, mainly at home area and USA(Utah, Arizona, Colorado, Nevada, New Mexico, Texas, Oklahoma, and a few states more).
This I can see confirmed(touble in the air) when I do load my perfil in options for each use I got, there can happen often lately a lag of time to show up.
And I do know something does not want to straight up.
Also I remember lately right now where my Hotas Warthog did not respond
, in flight or on ground already rolling out after landing, that’s funny when you crash your Concorde and the reverse Thrust mapped does not work now and again after such a long flight, this is really nasty such suden bug ending up in a building or trees.
I(!)`do remember the opposite in December happening the reverse: I want to fly and my aircraft is stucked on the ground with a hell a lot of messages coming up on screen: yes the brake gots released and the message is beautifully green, but 1,5seconds later: release break please to… 
I had a ticket in trying to explain detailed such issues, I think it should be not to difficult to understand me, but Zendesk ignores such issues, WHEN I CAN SEE on screen that something in loading the options is not working at his best.
But what I can do, I am just a user of this game, it can work, as also does not.
Such is Microsoft Asobo life.
Hopefully they will get behind it, there is sufficient loaded in my machine.