i have the same issue as reported here:
https://www.ads-software.com/support/topic/grouped-products-not-working-3/
i have also grouped products with the included products ONLY having retail prices, and no wholesale prices,when NOT logged in as a wholesale user.
Also tested with the suggested clean install, and as suggested to NOT change anything and to use a NON-wholesale user.
Strange that you cannot reproduce the issue and set it to resolved!
The user also informed you twice how to test, and you still logged in with a wholesale user and added wholesale prices!