Standard Invoice Entry not prompt error when Taxable Amount plus Tax not equals Gross Amount

Hi! We are on E920 Tools 9.2.3.1. When working with Standard Invoice Entry, we enter invoice like below.

Then we override the Taxable Amount and Tax as below. However, the system does not prompt error which the sum is not equals the Gross Amount and let us pass through to G/L Distribution.

Tested in Pristine, error like below should be prompted.

Anything missing in our setup?

Regards,

Kwan Lam