Thanks for the report, this might be a combination of the other two. Can I ask you to wait until we fix them and then see what the behaviour is?
Cool will do 
Think mine sounds like a combo too 
My missing transaction is showing now
Iāve made another transaction too which is currently pending. I havenāt pressed the manual refresh button though, so I donāt know if doing so would cause it to duplicate still.
We believe we have a fix ready to go and would like some volunteers to test it with. If you have the duplicate/missing transactions problem and would be happy to test this please DM me your Monzo email address and Iāll enable it for your account.
I know longer seem to be experiencing this issue - as of about 1-2 weeks ago!
Happy to test if itās still useful though?
Mine corrected itself a few weeks ago I havenāt had any issues since, although I have only made a couple of transactions on my Amex card since then. I donāt think I used the manual refresh button since whilst either of the recent transactions were still pending, so I donāt know if doing so would have messed it up again.
The fix is now live for everyone. If you still have any issues with duplicates/missing transactions on Amex connected credit cards please let us know