i had the same thing, so i went back to the end if miss 6 (because I also had another bug where it wouldn’t let me research multigun corvettes due to my research ship being destroyed.) had no further bugs from there on out (apart from one ill mention in a sec) and I saved the game manual but made sure I went back to the main menu when loading them.
The only time i didnt do this in the miss where there is a shere of ion frigates (miss 14? i think) I destroy the target then it would move forward.
The weird bug I mentioned was when I hyperspaced into miss, 7 after rebuilding the research ship, the game’s auto balance difficulty system went insane apart from all the normal ships there were 15 multi ion frigates, I could have destroyed them all but i wanted to sallvage, so reloaded built the corvettes and then reloaded, then no multi ion frigates.
Tbh hw1r was way tooo easy, mainly as there were just to many resources available, that needs to be addressed, started playing hw2r and it seems more balanced, although im only on mission 2.