Why don't you switch to the Pips option instead of Price fraction. It's a long story, but for the chart in your screenshot I think that 1 pip is 0.001, not 0.01.
So, Round numbers detector should do something on each new level. I don't remember fixing that block soon and I think that the block is not buggy in the desktop version. But I don't know what else can be. If these blocks from the screenshot are under "on Tick" and if this is an EA, not a script, it should work. But first make sure that Round numbers detector is doing what you want. I would connect it with some Draw Arrow blocks to see the levels at which it gives me signals. And I did that in the web version... looks as I expected.
Again, try with Pips
I told you, even I don't know what to expect from these options, as there is no other option to select from where to get information about the next lot size. I don't know, something is missing for me about these options at the moment and in general I don't like adding functionalities when I'm not sure about them at 110%. Because if I add something and it turn out to be a bad idea, in the future I will need to deal with eventual problems