Rent stolen from management dropbox

So my landlord called to tell me the rent was stolen from their dropbox i canceled the check immediately after being informed. Now they're asking for me to pay again which is kinda an issue right now.. i have proof i put in the dropbox, receipts from my bank etc... my question is am i still responsible to pay again? I live in oregon. Edit. Ive read similar posts on google with responses from lawyers saying its not the tenants responsibility if theres proof of it being dropped off in the dropbox of management & if its not cashed .. i cancelled it because they told me to but i also have proof they stole it because i never said what type of check it was & the landlord was asking me to CONFIRM what was on it. @lauren its not common sense to someone whos never been in this situation!! Obviously thats why i asked. For everyone saying the money didnt come out of my account IT DID and wont be returned until after 90 days!! So therefore its gone. Its A Cashiers check .The bank is doing an investigation.