ensure conversion is done to initialise amount entry box.
MODIFY
WalletWasabi.Fluent/Controls/CurrencyEntryBox.axaml.cs
WalletWasabi.Fluent/Controls/CurrencyEntryBox.axaml.cs
@@ -44,6 +44,7 @@ namespace WalletWasabi.Fluent.Controls
{
this.GetObservable(TextProperty).Subscribe(_ => DoConversion());
this.GetObservable(ConversionRateProperty).Subscribe(_ => DoConversion());
+ this.GetObservable(ConversionCurrencyCodeProperty).Subscribe(_ => DoConversion());
Watermark = "0 BTC";
Text = string.Empty;

ensure conversion is done to initialise amount entry box.