OK, so I have setup a very primitive version of what I think you have.
So a screen called Screen5, not that that matters. With a DataTable hooked up to a SharePoint List with OnSelect of the first column configured

I click an entry which takes me to screen6, that has a back icon, configured as Back() and a DisplayForm, set to the same DataSource as the DataTable on screen5 and the item of the Form set to

I click the back icon and am able to immediately click another item and it will keep going with one click. So unless there is something fundamentally different in your setup, we should be safe to say that it should work how you want it.
Now things I would check are conflicting controls. So for example the other day I had working visible controls just disappear on me and in the end I had to ensure that whilst that control was present, the other controls were not visible for the controls to remain consistently. So definitely check that.
Also and it pains me too, but that previewer is handy but should never be taken as gospel as that has done me over many a time with appearing to work as I would want it to, only to do something completely different when coming to run the app for real 😞