Yes, loyality modifier loyalty modifiers can drop if u you reach another lvl level of your basic skill. Loyalty works a bit differently than it seems, for example seems. For example, you burned 100 mana and you have 1mlvl to advance from level 1 to level 2 u you need to burn another 100 mana but with 50% loyality loyalty you have burned 150mana after burn burning 50mana(225mana in total) you should have 1+(1loylity) but if u 1+(1loyalty) but if you burn 100mana you will advance to 2mlvl but your total mana will not be enough to achieve lvl level 3 so u will temporary temporarily lose skill from loyalityloyalty.