I use Blender v2.83.6 on Linux Mint and I have an annoying systematic problem. Before saving my project I inspect my work : all is in place, so I do CTRL-S. When I re-open the file, 2 objects (always the sames) have moved. One on Z axis and the other on Z and Y. Each time I must reordered these objects. I'm new with blender and I can't figure what happened. Is it a bug ? Could you guide me ?