Hi nicholson,
There is no assessment phase for people being reassessed while already on ESA (or for those migrationg from IB). You will continue to get your current level of ESA until and unless a decision is made to change that situation.
You should treat every ESA50 as if it were the first and not assume that DWP have access to any previous information about your condition.
If you have any further queries, please come back and ask them on this thread - it will be easy to find in future if you mark it as a 'favourite' now.
Nothing on this board constitutes legal advice - always consult a professional about specific problems