Im using 3.10.14 version of QGIS and something very strange started happening. I performed several attraction distance and attraction reach analyses (using the Place Syntax Tool) that I saved in the same layer. Then I would usually duplicate that layer (right click -> duplicate layer) to change the visualization settings to create different maps. I have been doing this over the course of 2 months. When I opened the project recently I saw that the values for some of the analyses in the attribute table had changed either to NULL or to a mix of 1, 0 and NULL. After I redo the analysis it looks fine again, but when opening it after a couple of hours it has changed again.
Has this happened to anyone else and do you have any suggestions as to what Im doing wrong?