Interest on casg : withholding tax and tax rate?

[Bibi]

Hello,
Checking this morning in my ‘Interest on cash’ tab, I see 2 lines: withholding tax and tax rate ?

Tax rate is 20%, in both my euro payments and dollar payments.

• is this tax normal on a cash amount (vs a tax on a dividend received)? And why 20 % ?
• or it is a ‘display bug’, i.e. no tax is retired from the paid amount ?

Thanks in advance !

[Zergui]

This is covered here.