Healed, I am thankful my T doesn’t work in an office like that but I do have anxiety about people knocking or coming in. Thankfully my T knows that would be extremely disturbing to me. His fault or not he would expect to have to do a lot of repair it I’ve work to get us to OK again. I suspect he would expect a lot of emails and over the top emotional reactions. His office is my only safe space and for someone to violate that he would take just as seriously as any other form of abuse.
I am sorry your T has not emailed, they may be trying to resolve the issue of interruptions or may be feeling very upset about it themselves. Hopefully you can talk it out next session.