If I copy a figure from my bank, or a digital invoice, it often has commas in it.
When I paste "3,892.94" into a transaction, eg transfers between accounts, you get an error message.
Can't you get the input to strip the figure of commas? Keep the full stop obviously, but just take out any commas?
While this might not be a big and sexy change, it's little things like that that get frustrating.