Access Wait popup form shows blank

Hello. Using vba for Access 365, I want to display a “Wait” pop up form, with some nice and relevant design, that would open at the beginning of a long code execution (takes about 1 or 2 minutes) that takes place on the main/calling form, and then close once that execution is done. It is working, the Wait form is opening and closing as and when expected, except that its contents are now showing at all – it all comes out blank. I have 3 different types of controls on the Wait form: text boxes, labels and one bmp image – none of them shows. When I open the Wait form alone, outside/independently of the main calling form, all controls show up perfectly. Any idea how to solve this? Thank you.