Attributes have been created with tooltips. Once upgraded, some of the tooltips were removed from the sub-subproject attributes.
Steps to Reproduce:
Expected Results: The tooltip should still be visible
Actual Results: The tooltip is deleted
The attribute's tooltip is removed if the attribute's name is updated
This happens on all attributes including attributes in subobjects and sub-subobjects as well.
The caches have to be cleared for the issue to occur which is why it seemed this happened after an upgrade.
This is DE78163, fixed in 16.2.0