MR query re 11 day PIP Extension -

Hi, had a letter saying my PIP award had been extended by 11 days - it was 4 June 2021 to May 19 2027 it’s now until 3 June 2027. Seen a few others with the same weird few days extension and it seems to be a rounding up thing so that my award is now 6years exactly other people’s are now 5 or 4 exactly. Considering the length of some extensions I’m wondering whether it would be worth asking for an MR as got initial award for 5yrs at tribunal (enhanced on both) and 6yrs at review after an MR. If I query this extension is it just the extension they will look at or am I going to get reassessed/have the award looked at as a whole - trigger a load of stress I don’t want! Any advice would be appreciated TIA