Section action detailModelConfigured gets called twice

Dropped in STV version 5.2.1 instead of 5.1.3, now all my custom cells added within

self.tableViewModel.sectionActions.detailModelConfigured = ^(SCTableViewSection *section, SCTableViewModel *detailModel, NSIndexPath *indexPath) {
  //(...)
  SCDoubleButtonCell *contactsButton = [SCDoubleButtonCell cellWithText:@"" boundObject:nil objectBindings:nil nibName:@"DoubleButtonCell"];
  [buttonSection addCell:contactsButton];
  [detailModel insertSection:buttonSection atIndex:0];
  //(...)
};

get added twice. Debugged it and found that the detailModelConfigured section action is called twice for only one call to

[blockSelf.accountsModel dispatchEventSelectRowAtIndexPath:indexPath];