I got an IR under no warning and no assignment, actually I've asked my manager more than 2 times to give me more tasks.
My manager's manager has a bit of history with me. I blamed him because he highlighted my work in his MSR 3 years ago ( He is a peer with my former second level manager, who has left intel 2 years ago) .
I got certificates from my customer to prove my work, so HR suspend my IR, I also recorded my 2nd level manager's voice, he said "There is no meaning to argue about work" - it's an indistinct signal but enough to prove he want me to leave not because of my output...
After HR suspended my IR, he sent a message to my manager, said "if" I have no improvement in 1 month, then should give me a out of circle IR with document.
What should I do for such a sh--ty second level manager?