Hi my Whatsapp is misbehaving I believe due to cross platform usage in a number of different locations.
I think I can cure by uninstall followed by a fresh reinstall.
However my device widget doesn't give an uninstall option. Further the option's not available through app settings.
After searching this forum one suggested successful fix was to switch on animations via developer mode. After managing access to developer options by clicking build number x 7 times to get into dev. mode I enabled animations but it's made no difference to operation of the "whatsapp" widget.