Assert frequently when scrolling down

[tot0rokr]

When I input Shift + Arrow Down consecutively, an assertion raised as follow:

thread 'main' panicked at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/core/src/cmp.rs:907:9:
assertion failed: min <= max
stack backtrace:
0:     0x563f86ac687a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h1b9dad2a88e955ff
1:     0x563f869d3ecb - core::fmt::write::h4b5a1270214bc4a7                                                                                                                                                                                                                                                                                                                                                       2:     0x563f86a95bf2 - std::io::Write::write_fmt::hd04af345a50c312d
3:     0x563f86acb374 - std::panicking::default_hook::{{closure}}::h96ab15e9936be7ed
4:     0x563f86acbcc5 - std::panicking::rust_panic_with_hook::hfe205f6954b2c97b
5:     0x563f86acb672 - std::panicking::begin_panic_handler::{{closure}}::h6cb44b3a50f28c44
6:     0x563f86acb609 - std::sys::backtrace::__rust_end_short_backtrace::hf1c1f2a92799bb0e
7:     0x563f86acb5f4 - rust_begin_unwind
8:     0x563f86938442 - core::panicking::panic_fmt::h3d8fc78294164da7
9:     0x563f869385db - core::panicking::panic::hec978767ec2d35ff
10:     0x563f86964ee4 - git_igitt::ui::draw_graph::h76b89a9b4f8a25d5
11:     0x563f86978c16 - git_igitt::run::hdc173d2b59d51c17
12:     0x563f869727a2 - git_igitt::from_args::h09d46dacc9baa50f
13:     0x563f8696a928 - git_igitt::main::haa070ad50b063d91                                                                                                                                                                                                                                                                                                                                                      14:     0x563f8694f413 - std::sys::backtrace::__rust_begin_short_backtrace::h5de0138148e23425
15:     0x563f8698183b - main
16:     0x7fb5e0b32d90 - <unknown>                                                                                                                                                                                                                                                                                                                                                      17:     0x7fb5e0b32e40 - __libc_start_main
18:     0x563f8694b845 - _start                                                                                                                                                                                                                                                                                                                                                      19:                0x0 - <unknown>

If you scroll down to the last line, then up to the first line, then back down to the last line, it will always happen.