Customer confirms invoice or offer conditions - Variables

If I have configured Invoice Ninja so that a customer has to confirm the offer conditions in the customer portal when he accepts an offer, unfortunately variables that I have stored in the offer conditions are not "resolved" in the confirmation window. It would be great if this could be changed.

Example of an offer condition that contains variables:
"
Ihre UST-ID: $client.vat_number

Zahlungsart: $custom1

Zahlungsziel: $custom3 Tage

Auslieferung:

$custom2

$client.custom3
"
See attachments.

Regards
Martin
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