I have a relatively new (only a few months old) Tt eSPORTS POSEIDON mechanical keyboard. Long story short, a few days ago, I noticed the tab key started not working half the time. Taking the key cap off, I figured out that the key is only registering when the switch is being pressed to the left as it is being pressed down.
I've recently been trying to switch to the Dvorak keyboard layout, which is going pretty well (writing this from QWERTY). In the process of researching the different layouts available I was made aware that there is such a thing as ergonomic keyboards and I explored a lot of that.
The model that I like the most is the TypeMatrix EZR-2030 keyboard.