House missions backrolling your progress

Can Riot please hand me back the mission progress I've lost to some random backrolls?

As if the unusually long and significantly more tedious missions than before isn't bad enough, they backroll your progress when you're not looking, too. I had 11 missions completed, went on a break and come back a day later to find I'm back to 8 on the counter.

I don't get that much time to play games these days, and the next thing I want is the game cynically backrolling your mission progress because reasons, on top of the fact a video game's god damn mission already takes job level time/commitment to complete.

And what's even worse, is that I fear the 8 on the counter is the only save-point, forcing you to complete missions (12 missions and 20 missions respectively) in 1 go or go bust. I guess the 12 missions from 8 isn't impossible but do I have to seriously lose sleep time over a game mission because Riot couldn't do save-point that's been a staple of video games for like 4 decades? Let's not mention the 20 missions from 8 in 1 go, just no fucking way. If this is the case, that would be extremely tilting indeed.

I could only assume the backrolling is a bug, but can Riot please fix it and give me back my progress? Thanks.