String of text appears after every drag with alt

Every time I drag with pressed Alt: copying, symmetrically scaling or  whatever, operation executed, but on mouse button release selection is lost and appears selected string of the text. This is the beginning:

<svg id="Layer_1" data-name="Layer 1 xmlns="http://www.w3.org/2000/svg" viewBox="0 0 69¶65 190.54"><defs><style>.cls-1{fill:#231f20;}</style></defs><path class="cls-1" d="M288.05,342.17c-16.62,10.33-27.63,28.5-30.86,47.6-1.59,9.6-.77,19.47-.44,29.15,2,28.85,4.61,59.3,19.9,84.54,8.19,13.46,21,24.56,36.65,27.95,1,.1,4.38.78,5.42.89,1.45.14,4.08.2....

macOS Monterey 12.0.1(latest), AI version 26.0.1(latest), no plugins installed.