I uploaded a #photo on #pixelfed with #tusky, why is it resized?

Here are the two photos, the original and the one I received over at #Friendica from Pixelfed.

Files:
https://files.utzer.de/r/xtUdS7ep_b#ZGUq27DP6ryJfwCT7VtqeXbMpmDPkhIGhPM+yuZXDII=
https://files.utzer.de/r/M7pvXu2aSK#i/AGrN+zMOZemtZ61QRfLEQ6QCwdozT018SjU4Ep4qw=

Pixelfed:
https://pixel.tchncs.de/p/utzer/440625505980488487
@Friendica Support