As many of your know, there is a bug in 3700.3.0 in the test/staging environments where banner/logo images cannot be updated in the Ultra Base Navigation's Institution page.
Article # 000050739
A fix has been created and is currently going through QA. There has been some conflicting information as to how this updated version would be pushed out. I found out late last night if the updated version passes QA, it is currently planned to be pushed out to test/staging environments Friday, May 31, 2019. Please note, this is the plan. If the update does not pass its tests, the push may be rescheduled.
As always we are encouraged to watch support bulletins for updates.