I'm also affected today. And the 'find transaction' option doesn't work because the original transaction has already been matched. When I check the bank register and bank reconciliation the original transactions are unaffected. The oldest duplicate is about a month old. We need this fixed sooner than a support request will be looked at (sitting on around 2 weeks reply time for mine at the moment).
Transactions that should have appeared overnight are missing.
[Sorry, I'm not sure how this got duplicated when all I did was edit the original message - or if you're only seeing it once, then it must be glitching at my end.]