Voltage Regulator Overheating
If you make 3.3V from 24V with a linear regulator, you will dissipate about (24V-3.3V) * drawn current = 20.7 V * drawn current. So, for e.g. 100 mA, this is 2.07W.

Although the LM1086 has a thermal protection and won't get easily damaged, the thermal protection will reduce the output current or even just shut down the regulator. In both cases, it is undesirable.

You'd better use a switching regulator.