Tempo issues after latest Audacity update

After the latest update from audacity, 3.5.1., when I move to export a file, the tempo of all voices changes on the file once it is exported. Has anyone encountered this.

I dont find this happening…not for a simple export… How much is it changing how are you measuring the change and is a speed change or a pitch change…???
Is the file in question just opened/imported and then exported or have you carried out various resampling and pitch or tempo changes before exporting…???