I just figured out a hack to get my custom build working at a pretty much constant 100% speed with all consecutive missions (except some very minor speed changes that are normal for PPSSPP...I think). Unfortunately it seems that the official build has a different problem since I tried applying my new hack to an official source which I recently downloaded to test what makes the new update tick with consecutive missions and the speed problem remained the same problem in the official build with this new hack and my other 2 hacks. I still do hope it'll someday be playable without hacks though.
Mission description text, NPCs and the archive are still broken with my new hack.
@LunaMoo I realised my problem before was that I had fast memory on. I didn't know it was enabled by default nowadays (I haven't used the official build in a long while) and when it uses GE2 v1.40 with the 2 hacks it will run into invalid addresses every second mission (which of course will cause it to crash with fast memory enabled). Fast memory off works since it seems to be able to work past those invalid addresses.
Mission description text, NPCs and the archive are still broken with my new hack.
@LunaMoo I realised my problem before was that I had fast memory on. I didn't know it was enabled by default nowadays (I haven't used the official build in a long while) and when it uses GE2 v1.40 with the 2 hacks it will run into invalid addresses every second mission (which of course will cause it to crash with fast memory enabled). Fast memory off works since it seems to be able to work past those invalid addresses.