This has been an issue for a longer time for me.
When I am on the exchange screen (not auto-exchange) and tap a currency to change it, it takes about 5 seconds until the list of currencies is loaded.
Using the “choose source” field at the top takes about 3-8 seconds until the suggestions are updated.
I am using a Samsung A5 2017 with Android 8.0.0.
Did anybody else experience the same?