Hi @0809 welcome to the forum.
We are going to need way more information to be able to help, such as OS version, RT version, camera and lenses used, and sample files and pp3 files if possible.
Using Windows 11 x 64 and Raw Therapee 5.8, Camera is a Nikon Z7ii with a Nikon AF-S Nikkor 55-300mm 4.5-5.6 lens
I have no problems when I use a Sigma 150-600mm 5-5.6 lens
I have attached a copy of the original image uploaded to Raw Therapee, the pp3 file and the image after it opened in Editor in Raw Therapee
DSC_8936.NEF (36.9 MB)
20200417_Balkon_1395.DNG.pp3 (11.9 KB)
Confirmed with RT 5.9-dev on Linux.
Opens fine in ART.
I have downloaded RT 5.9 and attempted to edit the picture and still get the same result when I attempt to edit the picture.
Confirmed on Win10 with RT5.9 dev
Loads fine in Darktable 4.4.2
Win 10 22H2