## Summary In 4.0.15, 4.25 and recent automated builds the green line representing the sliding window is not displayed correctly ## Sample capture file [20240520-speedtest-one-tcp-stream.pcapng](/uploads/51cffda9376d7beaab6823529eecab49/20240520-speedtest-one-tcp-stream.pcapng) ## Steps to reproduce Open the tcptrace streamgraph ## What is the current bug behavior? The sliding window line is below the ACK line at the start of the session. Zooming in on a part of the graph makes it even more weird.  ## What is the expected correct behavior? This is how it should look (screenshot from version 4.2.3):  ## Build information Version 4.2.5 (v4.2.5-0-g4aa814ac25a1). Compiled (64-bit) using Clang 14.0.3 (clang-1403.0.22.14.1), with GLib 2.76.6, with Qt 6.2.4, with libpcap, without POSIX capabilities, with zlib 1.2.11, with PCRE2, with Lua 5.4.6, with GnuTLS 3.8.4 and PKCS #11 support, with Gcrypt 1.10.2, with Kerberos (MIT), with MaxMind, with nghttp2 1.56.0, with nghttp3 0.15.0, with brotli, with LZ4, with Zstandard, with Snappy, with libxml2 2.11.5, with libsmi 0.4.8, with QtMultimedia, with automatic updates using Sparkle, with Minizip, with binary plugins. Running on macOS 13.6.6, build 22G630 (Darwin 22.6.0), with Apple M2 Pro, with 32768 MB of physical memory, with GLib 2.76.6, with Qt 6.2.4, with libpcap 1.10.1, with zlib 1.2.11, with PCRE2 10.39 2021-10-29, with c-ares 1.19.1, with GnuTLS 3.8.4, with Gcrypt 1.10.2, with nghttp2 1.56.0, with nghttp3 0.15.0, with brotli 1.0.9, with LZ4 1.9.4, with Zstandard 1.5.5, with libsmi 0.4.8, with light display mode, with HiDPI, with QPA plugin "cocoa", with LC_TYPE=C, binary plugins supported.