wb_ctrl ports of ECP5 litedram_core generated for OrangeCrab02-25F failing when user_ports is native

[fontamsoc]

I am successfully using litedram_core on OrangeCrab02-25F when user_ports is wishbone,
however when user_ports is native, liblitedram fails to initialize the controller through its wb_ctrl ports.

Here is litedram_core generated with user_ports set to wishbone:
litedram.v.txt

Here is litedram_core generated with user_ports set to native:
litedram_native.v.txt

Here is a diff of above litedram_core:
litedram.v.diff.txt

From above diff, any idea why liblitedram would fail to initialize the controller through its wb_ctrl ports when user_ports is native ?