I would keep in touch with your provider. Covid-19 should not affect closure directly, but, of course, it will depend on their working arrangements and health.
I would stop the payments, but set the money aside in case there is an issue and they extend or want some made up. But don't stack up more than three payments without confirmation from your IP to stop permanently.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk