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Thank you for an answer but in both is the same. Mainly I had used and still im using firefox, but Ive just installed this addon in Chrome and there is the same behaviour.

For example in a group you have 2 dials: one aliexpress, second ebay. Third one is empty one with plus. Now I want to drag ebay dial to bottom right corner, but I cant now. In both browsers I can only drag dial on a place of other defined dial.

Before change plus (empty) dials were visible on a whole page, and I could put dial on any of them.

Im visual learner, and it helped me a lot in a better organizaition of dials within a group. Maybe it could be an option to turn this ability on?

The same bahaviour of this addon is on different three computers, so dont think that its just my local problem.