I just updated to Hikashop 4.
I see some things that are not working.
I have now a checkout process of one page to see overvieuw.
1. titles are not showes if i set show title in checkout process builder
2. Checkbox same for adress is not working
3. the language tag is different, it is guest checkout and i see register instead of next.
4. It get stuck on some ajax functions sometimes when i used multiple steps
I now just disabled all the overrides of RCA and it is working now.
But it would be nice if you guys fix this issue ofcourse :-)
Result RCA theme