3.1.3

this is very very weird, I sent .5, it worked. But I try .5 again, doesn't work. I try .2, works. Try .2 again, doesn't work- invalid OTP again.

It seems like the less and less I send, it'll work but this is going to not work for me. I have no idea what's going on. send help

I have a 2fa wallet, when I sent less than like .5 BTC, it'll work fast and send. When I try higher amounts, it'll get stuck on signing transaction for two minutes then give error invalid OTP. Why?