Keep track on your calories. You *might* be eating a lot more than usual, hence the increase in weight.

track your calories and track it well.

like i mentioned earlier, you are probably eating more than your deficit target.

and.. add more intensity in your workout.

Ini broscience broo..

Whatever exercise you do (combining with proper diet), will burn fat.. this includes strength training. Just a matter of how intense the exercise is.

You can't spot reduce the fat.. by doing abs training will not directly burn the belly fat. You burn fat by doing overall bodywork exercises. By eating less than maintenance, combining with proper training, it will expedite the fat loss process.