selecting blocks in sidebar eclectic/jumpy/faulty

I suppose this is somehow contextual to some general problems with the sidebar… But I think this is probably helpful to register:

Since recently, when selecting blocks in the sidebar the selection jumps over single blocks (in block selection mode). This even happens when blocks are indented – here as well I regularly see the cursor jumps over single blocks to next higher level block.

This happens systematically – so I try selecting several times, and in different directions (top/down).

– PS: just notice – sometimes it seems that the block selection moves in 'two's' (while also jumping 2 consecutive blocks) … and it does that regardless of any hierarchy positions of the blocks (first I thought/mused only 'lower level'-hierarchy blocks are passed over…) 🕴️🕴️ – 🤷

*This* is a pattern when using keyboard (arrows) for selection, not mouse clicks…