I can confirm multiclass warlock spell slot bug as well. The bug only persists when you have warlock spells slots and regular spells slots of the same level. Currently, when you have warlock spell slot and regular spells slot of the same level, the game forces you to use all of your regular spell slots first when casting spells outside of the warlock spell book and forces you to use all of your warlock spell slots first before regular slots when casting warlock spells ( the second condition is usually less of an issue because people want to use the warlock spell slots first because they return on short rest).
For Example : If I was a paladin 2 / warlock 1 (Regular Spell slots: Lvl 1 - 2, Warlock spell slots: Lvl 1 - 1 )- I am unable to use warlock spell slots to cast Paladin spells until I have used all of my regular level 1 spell slots. On the contrary, if I tried to cast a spell from the warlock spell book, I am forced to use my warlock spell slot first, then I can cast it using my regular spell slots.
Example when bug is not prevalent: If I was Paladin 5 / Warlock 5 ( Regular Spell slots: Lvl 1 - 4, Lvl 2 - 2, Warlock spell slots - Lvl 3 - 2) - The bug is not prevalent here as there is no conflict on which type of spell to be used for each Level. I have only regular spell slots available at levels 1 and 2 and only warlock spell slots available at level 3.
If I had to guess there is probably some conflict in the game coding, because the spell wants to prioritize using spell slots from the spell book it is in before any other spell slots. I'm guessing having two types of spell slots that function differently casting the same spells causes some difficult coding issues to implement.
Last edited by Boomdawg; 03/10/23 06:28 AM. Reason: clarity