Do you have Mods or CC (or have you ever had them)? If you do please remove them in this process and try the troubleshooting as described below. (If you don't have Mods or CC, just skip the part about removing the Mods folder, but still delete the cache file mentioned and run the repair.) If you ever had Mods or CC in the past then do the steps as if you have them currently (removing the Mods folder), as there could be damage that has remained after you removed them.
If it was Mods/CC: If this fixes the issue I would recommend that you check with the Mod and CC creators to see if there are any known issues with their Mod/CC clashing with the recent update and if so do they have an updated Mod/CC that will address the changes in the game's code from the update. You can then re-add your updated Mods/CC one at a time to see if one was conflicting with the function/causing the glitch - but do not re-add the old Resource.cfg file from the old mods folder, as it’s possible for it to have become corrupted.
If you have a lot of Mods or CC you can do so by via the 50/50 method. Let me know if you need directions on this.
I don't use mods 1 bit. I'm actually not a fan of them one bit. I'm repaired my game and it still caused the issue. It is clearly a bug in my book. I'll repair my game a few times and see if that fixes it. If it doesn't fix it after probably the 5th repair then you need to fix this ASAP. Please try this yourself though in your game. I feel it is an actual bug since the tiny update before Eco release. I own all packs.
The game had an update and the bug is still there I dd as requested and uploaded a lot to show the problem of a main floor to basement bug report, To find me on the gallery look up Elithian87 and the name of the lot is Oakenstead. Its the 50 by 50 lot but it does it to every lot. It is just the stair issue ONLY the stair issue!
