The advice has been sent out in schools in Aberdeen
Teachers in Aberdeen have been told to switch off the coronavirus contact tracing app whilst in schools.
BBC Scotland has seen a letter sent out to staff asking them to switch off the software, which alerts users if they have been in close contact with someone who has tested positive.
The letter says the app does not take into account mitigations in place.
However First Minister Nicola Sturgeon said the app should not be turned off if you have your phone.
The letter indicated staff had been told to self isolate when public health colleagues with "knowledge about the mitigations" said there had been no need to do so.
It states: "Please ask staff in your schools to disable the Test and Trace app while working in school".
'Extra clarity'
Aberdeen City Council co-leader Douglas Lumsden told BBC Scotland it followed advice from local public health colleagues.
He said: "What they had decided was that because teachers were using PPE, they shouldn't be deemed as a close contact and therefore at risk.
"We've now passed the issue on to the Scottish government to investigate to get further details because for me there should be national guidance given to local authorities so we can pass that information on to members of staff. We're seeking extra clarity at the moment."
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Asked about the issue, Ms Sturgeon said: "We shouldn't be asking people to switch off the app, in my view, when they have their phone with them.
"That's defeating the purpose of Protect Scotland. We should be encouraging people."
Aberdeen City Council later said in a statement: "We have been working closely with public health officials locally and have agreed an enhanced level of PPE equipment for teachers and classroom assistants which is above that in the national guidance.
"We had a positive case in a school and we undertook an investigation and public health also made an assessment. The use of medical-grade PPE by staff resulted in them not being identified as a close contact.
"Some time later, the app sent a message to the same staff and asked them to self-isolate. Public health advised that staff disable the app whilst in school. We passed that advice on to schools whilst we await an update from the Scottish government who we advised of the issue on Tuesday evening."
Public Health Scotland said it had not issued any national guidance in relation to this issue.
The EIS teaching union said its view was that it was acceptable where teachers were leaving mobile phones in secure lockers or staff bases whilst they were teaching elsewhere.
However, where someone keeps the phone in person, it saw no reason for the app to be switched off.
