ctpv doesn't work as expected

[rEnr3n]

I'm currently using ctpv as a terminal previewer in lf (sandboxed using bwrap)
https://github.com/gokcehan/lf/wiki/Previews#with-stpv-and-ctpv
https://github.com/gokcehan/lf/wiki/Previews#sandboxing-preview-operations

All my current previews for documents (.pdf .xlsx .ods), pictures and videos look sharp.

I'm trying to move my sandbox script to landrun.

set -euo pipefail
(
    exec landrun \
      --unrestricted-network \
      --unrestricted-filesystem \
      --env HOME \
      ctpv "$@"
)

Testing this script first and my previews turned blurry as if it was using chafa for previews. I thought I'm lacking environment variables so I tried an ltrace.

$ ltrace -e getenv landrun --env HOME --unrestricted-network --unrestricted-filesystem ctpv 16.png
--- SIGURG (Urgent I/O condition) ---
--- Called exec() ---
   ▄▅▅▅▅▅▅▅▅▄
 ▄▆       ▃▁ ▆▄
▘       ▗▄▇▌▘  ▝
    ▗▄▂▄▘▃▘▇
▖   ▝▄▂▂▄▘     ▗
 ▄▂   ▅▅     ▂▄
   ▅▃▃▃▃▃▃▃▃▅
--- SIGCHLD (Child exited) ---
+++ exited (status 0) +++

The stuff at the middle is the blurry image. I'd appreciate some help.