PrusaSlicer 2.9.0 Setting Bug

[Julcatsi]

Description of the bug

I have encountered what I believe to be either the same or similar bug multiple times. I recently updated my PrusaSlicer to 2.9.0 after using 2.6.1 for a while and I have repeatedly found that my settings are not being implemented into my sliced parts.
Here are a few examples of what I have seen:

1. Spiral Vase mode activated, but parts are sliced with infill and top layers (pictures included)
   
   

2. Setting Custom G-code for color change and saving which was working in the g-code one time but stopped being added to the g-code entirely the next day.

3. Changing filament and print settings which do not prompt a re-slice (I think this one really drives the issue home). I would have to manually move the parts around to be able to re-slice with presumably the new settings applied.

4. Filament disappearing after changing the printer two my second profile with two extruders and back to the original profile and only being able to get the filaments back after re-starting the software.

I can only speculate what the issue may be but I will leave that up to someone with more knowledge. I have re-installed the software a few times and not found the issue to go away. I have un-installed and re-installed it one more time and will see if it persists. If it does I will downgrade to 2.8 or 2.6.

As an aside, I wish that I was able to re-slice the file even if no settings have changed. Doing so is so fast and makes me more comfortable that the settings have been implemented correctly.

Lastly, there was one more bug I encountered, and I really am not sure if this is related or not but I wanted to share here:
I frequently import STLs which I made myself, and I like to design in inches, so that is what I export my STLs as. Usually PrusaSlicer identifies this and asks if I want to convert to mm or interpret the coordinates as mm. I always choose convert and it accurately slices my parts.
I found one time that PrusaSlicer stopped asking how to interpret the values and would always make the STL 25.4x smaller than what it should be, as if it was interpreting the units. After a few software re-starts I got it to ask again which then made it even worst where if I clicked "yes" it would make the parts 2x25.4 times bigger or if I clicked "no" it would make the parts 25.4x smaller, so there was no way to get accurate parts. Eventually a computer re-start fixed this; however, this is certainly a weird glitch and is what prompted me to finally make this post.

Project file & How to reproduce

I do not find that these are easy to re-produce and they happen at random.

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.9.0

Operating system

Windows 11

Printer model

Prusa i3 MK3