Hikashop 4.2.3 not in Joomla update notification

-- url of the page with the problem -- : go2lean.nl/
-- HikaShop version -- : 4.2.2
-- Joomla version -- : 3.9.15
-- PHP version -- : 7.3.15
-- Browser(s) name and version -- : all browsers
-- Error-message(debug-mod must be tuned on) -- : no error

Hi,

Today I visited the Hikashop website and noticed that there is a new version of Hikashop, 4.2.3 since february 2020.

I expected this in the Joomla update notification of extensions, but it did not appear there. I rebuild the update sites, and cleared the cache, but it did not show up.
There is also no updatesite listed with Hikashop in it, and when I go in the backend to hikashop / documentation / Update/about it says that I have the latest stable version (see attachement)

Thanks,
Peter