In the past, some Dolphin versions used to cause interference with other USB devices in some rare cases, but given your Wi-Fi card is PCIe, that rules this possibility out. I have no clue now, sorry...
(by the way, you can see which BT mode you're using in Dolphin's controller settings)
(by the way, you can see which BT mode you're using in Dolphin's controller settings)
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 16 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)