Aberrant 3D modeling of a multiprotein complex leads to the formation of a covalent interprotein bond Arginine - Leucine

I attempted to model a missense mutation in the NUF2 peptide located in the NDC80 protein complex. The substitution of a leucine at position 303 by an arginine in the NUF2 peptide leads to a covalent interprotein bond with the leucine opposite on the NDC80 protein at position 463. This interaction would therefore reinforce the quaternary structure of this complex.
Unless I am mistaken, this type of interaction cannot take place and I expected rather a destructuring of the region.

On the attached figure showing the modeling leading to the covalent bond between NUF2 and NDC80, NUF2 appears in green and NDC80 in yellow.

Could you explain to me where this issue comes from? Are there any parameters to change?

AlphaFold2.ipynb
{
"num_queries": 1,
"use_templates": false,
"use_amber": false,
"msa_mode": "MMseqs2 (UniRef+Environmental)",
"model_type": "AlphaFold2-multimer-v2",
"num_models": 5,
"num_recycles": 3,
"model_order": [
1,
2,
3,
4,
5
],
"keep_existing_results": false,
"rank_by": "multimer",

"pair_mode": "unpaired+paired",
"host_url": "https://api.colabfold.com",
"stop_at_score": 100.0,
"recompile_padding": 1.0,
"recompile_all_models": false,
"commit": "1f2d963e7705b0d8c847980e4b1c44243127febb",
"version": "1.2.0"
}

Start with the attached AlphaFold2.ipynb configuration and the reported NUF2 L303R/NDC80 L463 model image. Examine the AlphaFold2-multimer-v2 run and its reported covalent interprotein bond; done means determining whether the result is a modeling artifact and whether the listed parameters can account for it.