In Intel® Quartus® Prime Pro Edition software versions 19.4 and earlier, you may find that the Mailbox Client Intel FPGA IP does not function correctly when connected to an asynchronous reset including the output of the Reset Release Intel® FPGA IP when using Intel® Stratix® 10 devices.
Device Family: Intel® Stratix® 10
Intel Software: Quartus Prime Pro
Last Modified: June 17, 2020
Version Found: v18.0
Version Fixed: v20.1
Bug ID: 1808745414
IP: Altera S10 Mailbox Client