I have a computation running, where I use all my available kernels using
ParallelDo. However, if I check the kernels status under Evaluation -> Parallel Kernel Status, I only find the information "4 kernels running, busy" and a yellow plus-icon in the upper-right corner, which usually indicates a syntax error (type e.g. "1+" in a Notebook session).
Clicking the icon, the message
An unknown box name (FEPrivate`FrontEndResource["FEExpressions", "UnevaluatedDynamicBox"]) was sent as the BoxForm for the expression. Check the format rules for the expression.
is displayed. If there is no evaluation running, all kernel properties are displayed nicely.