This surely didn’t happen in my 3 years of warframe on Windows. Maybe changing T to any non-writable chararcter may help, but it does sound some sort of bug.
Also, there’s the infamous “message+w” bug where you press W to go forward while pressing to send a message you just typed, resulting in message+w, even though you clearly pressed Enter first and then W.
This last one is just how warframe handles these situations, but I can’t figure out why wine+warframe makes the t bug happen.
I’ll go with the non-character button solution for the time being, cheers.