Ive never seen an issue like this before,
but 99% of strange issues Ive seen are solved by making a new project and uploading.
Don't combine avatars on the same project, unless you know what you are doing.
Of course make sure you are up to date on creator companion, and don't run updates while unity is open, (latest SDK version at this time is 3.8.1, with VRCFury for SPS is 1.1234.0)
