Contradiction with Isaiah 45:5
While Psalm 18:46 extols the Lord as alive and personal ("The Lord liveth"), Isaiah 45:5 emphasizes there is no God beside the Lord, but does not specifically affirm His living presence.
Isaiah 45:5: I [am] the LORD, and [there is] none else, [there is] no God beside me: I girded thee, though thou hast not known me:
Contradiction with Psalm 115:17
Psalm 18:46 praises the Lord's vitality, whereas Psalm 115:17 suggests the dead cannot praise or acknowledge the Lord, implying praise and life are interconnected.
Psalm 115:17: The dead praise not the LORD, neither any that go down into silence.
Contradiction with Habakkuk 2:18-20
In contrast to the living God of Psalm 18:46, these verses discuss idols that are lifeless and unable to speak or guide, but also mention the Lord is in his holy temple, commanding silence.
Habakkuk 2:18-20: What profiteth the graven image that the maker thereof hath graven it; the molten image, and a teacher of lies, that the maker of his work trusteth therein, to make dumb idols? [maker of...: Heb. fashioner of his fashion]