I don't know.
I could let you know what the Speaker said in sending it to the committee, although the committee never studied the matter.
As a final wrap-up of the presentation, I would mention that in the time I had, I did look at other jurisdictions to see if I could find anything that might guide the committee in what is done in other places. I checked the website on Australia's House of Representatives' committee on privileges. It went back to November 1998, and I couldn't find a report on a similar subject matter.
In the U.K., of course, you have Erskine May, which makes reference to the privilege itself and gives you the history of the privilege, but it gives no information about incidents that have occurred recently.
I did check, and there were two very important studies conducted by joint committees in the U.K., one in 1999, and one in 2013. There is a reference to unimpeded access in the 2013 report. About that, they mention that the House of Lords passes an order on the first day of every session to remind the metropolitan police commissioner that the “House be kept free and open and that no obstruction be permitted to hinder the passage of Lords to and from this House during the sitting of Parliament”.
Why it made it into the report is that the House had ceased doing that in 2004. The joint standing committee thought they should recommence issuing this order, similar to what the House of Lords does.
I scoured other jurisdictions. I used Google to try to find out if anything had happened in Ontario, and the words “protests, members' privileges, impeded access” produced no hits. That might be a witness worth calling, if members were interested in finding out what has happened in the provinces.