Could you open the browser debugger (F12) and run the microflow? please check if there is a message in the console.
Looks like it is a thread that is returning late from the threadpool-party trying to read/update/refresh one of the 'verwijderde stukken' ('removed parts'). To find out which widget has started this thread by removing them one by one (or a couple at the time) and starting the MF manually again. Most likely the guilty widget is one that aggregates data containing the 'removed parts'.
And another option is to build in a 1 second pause between the commit and the refresh. See if the error still occurs.
Hi Lex,
Did you manage to resolve this issue? I'm experiencing a similar issue, any information would be useful.
Thanks!