Could be related, someone reported similar problem about icons disappearing using Yalp, and re-appearing after reboot in the French category:
Shelter is using the “work profile” creating some kind of a sandbox for a subset of apps (for work) not accessing the personal data of the other ones (private). Assuming it does not do more than that (since not documented), it would mean the apps under the working profile are not isolated from each other. Anyhow good idea to use Shelter / work profile to isolate apps not privacy-compliant / trusted itill aalternatives availablefor those.