Polyline editing automatically switches to rotation

When trying to edit a created polyline, I encounter the following problem: there are “forbidden vertices”. That is, some vertices behave normally, and some vertices reset the editing mode and arbitrarily switch the editing mode to rotation. I had version 25.8 and I updated to 26.2 but the problem did not disappear. How to make it stay in editing mode.
Записування 2026-05-01 123908 (1)

In the Drawing toolbar, deselect the icon with tooltip Rotation Mode after Clicking Object
CalcRotationMode

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Not working unfortunately

Tested with version 26.2. A bit buggy the button and fuction.
Not available in version 25.2.

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Only the one on the Drawing Toolbar (View > Toolbars > Drawing) with the exact tooltip shown in my screenshot toggles the automatic switch. The one in the Drawing Object Properties toolbar will allow you to rotate an object if you have turned off the automatic switch but it does not affect the automatic switch.