@bi4smooth
Hello. Thanks for your answer.
I'll look for options/settings about cache, but transmission is quite simple.

I download large files from other trackers, much larger files and also more files per torrent. Never happened this.
I have this behavior in two computers, both using Mac OS (Mojave) and Transmission (3).

After posting I downloaded utorrent (which I would love to avoid, seems it was once a good client that became a bad player) and it seems to work perfectly (or at least with a healthy/usable variation). Connection does not drop to 0, although it fluctuates.

I'll try to investigate a bit more, but it seems transmission might be nor playing well with this site, no idea why.

@damirmarotta
Clarification: this only happens in this website. Others work fine

Hello.
I've recent got back to the forum using Transmission at macos.
I've tried with different ISPs, but always the same computer.

With other websites I can keep a steady connection, but in this (and only this) all my transfers stop after a few seconds, than restart.

It'll go up to a few mbps and than zero. Constantly repeating, like every five seconds. Five seconds downloading, five seconds 0.0kbps.

Is there anything I need to adjust in my torrent client?

Client says ports are open, port check websites confirm.

My settings are:

Things will constantly change from this:

To this:

Thanks in advance.