Recently I am getting proofreading suggestions which relate to the end of the previous flow. Example a flow ends con sordino for an instrument and in the next flow the proofreading suggests to put a senza sordino on the first note played.
Is this wanted? It is not usual I think to do this.
For once, a “problem” with flows. (Not really; more on that later.)
I’m not sure if you’re asking if it’s usual to undo the mute, or if it’s usual to notate that it should be undone. I would say the former is definitely usual, even standard; the latter is a bit less so, but certainly still common.
I’m reminded of string players, who might end a movement pizzicato only to start the next movement arco. Since arco is the default, you don’t have to include it at the start of the next movement. However, I’ve certainly seen it, usually parenthetically—by analogy with (some) cautionary accidentals.
In other, “flow-less” notation programs like Sibelius, you really do have to include the arco to get the expected “reset”, although you do have the choice of hiding it if you wish. Dorico takes care of the “reset” automatically (another nice thing about flows), but I think it’s good notational practice to remind players about it, anyway—hence the proofreading suggestion.
Some may think there’s a contradiction here, but I think it’s the best way of reconciling Dorico’s logic with notational practice. And the arco (or senza sordino, in your case) is optional in that you don’t need to specify it to get the expected behavior.
I would assume the former, by analogy with my strings example. The general idea is that a new flow automatically imposes an implied naturale on all instruments. I second @StephanK1 in notating the reset anyway, but in parentheses since it should be expected.