DisplayLink screen reverts to previous state and slows down Japanese input on M1/M2 M

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I have a multi-display environment with INC002QCBK(Belkin) and DisplayLink. When working on a multi-display screen, however, the changed screen reverts to the state before the change, which occurs when switching between multiple images while previewing them in Finder. When I think I have switched from image A to B, it returns to A, and when I move the mouse within the screen, it returns to image B. And Japanese input becomes infinitely slower. What is this? It does not seem to be just a problem of load on the PC.