How do I use Warlock spell slots before Wizard spell slots?

Variant: Spell Points - DND 5th Edition wizards spell slot How do I use Warlock spell slots before Wizard spell slots? This has to be a bug or it's a really cruel way to balance multiclassing Hellish wizards spell slot Instead of gaining a number of spell slots to cast your spells from the Spellcasting feature, you gain a pool of spell points instead You expend a number of

taco fury xxxtreme slot 2) You can't cast a Wizard spell with a Sorcerer spell slot