The Issue With This
Perfoming Cardio after Resistance Training is contra-indicated.
Cardio after Resistance Training mimizes or negates the anabolic and strength effect that was elicited with the Resistance Training Session.
More Indepth Information
The informaition in this post goes into a bit more depth.
doing “cardio” e.g. jogging before strength Controlling AMP-k and mTOR for Maximum Muscle and Fat Loss Dr Michael Ruldolph, Muscular Development Magazine, 2015 This artcle examined where to place Cardio Endurance and Strength Training in a program. The two elements that drove the most...
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Cardio Prior To Resisstance Training
Research demonstrated, noted in the above, that performing Cardio prior to Resistance Training ensured the anabolic/strength was more effective.
With that said, the issue with performing Cario and then Resistance Training takes something out of you.
More Effetive Approach
As you stated, either separating Cardio and Reisistance Training a few hour apart or train them inpendently on different days is a better approach.