currently, when transfering currency from another character via the new system, the currency amount is not updated for the character you pulled the currency from.

updating offline characters currency was not needed until the prepatch, but now you need to log in on a character you pulled currency from to update the data.

It would be nice if SavedInstances would update the data without loggin in/out between characters. This could help to implement that feature:

https://github.com/Gethe/wow-ui-source/blob/b4c9176d321abca2b959444c0379c5858a02c3af/Interface/AddOns/Blizzard_APIDocumentationGenerated/CurrencyInfoDocumentation.lua