@snuffleupagus: tiktok has very strict rate limiting/bot protection. therefore the requests are limited to request per second for tiktok. besides than that there are no limitations.
Please create a debug log. Enable Settings->Advanced Settings->Log.debugmodeenabled and restart JDownloader
Don't download anything but just add some links and then create log, see
https://support.jdownloader.org/Know...d-session-logs
and post shown logID here.
Also please provide example links for testing