PHP 8.0 > creates an issue with uLogger

if my site is using PHP 8.0.28 or 8.1.19 with Plesk on Ubuntu, ulogger uploads the track and I can see its points increasing in the manage tracks page, but on the live view page on WP it only shows the first point and the last received timestamp in info bar stays the same (The date and time of that first point).

In ulogger it reports in the synchronization section “xx points behind, server response error” despite the points increasing on the trackserver manage tracks page

turning the site back to PHP 7.4.33 and it works correctly and updates live view accordingly